How do you know they are telling whoppers Stuart? Where is your hard evidence? You're just asking rhetorical questions, not providing evidence.
There is no solid evidence, because the Saudi's are deliberately witholding the information. But I've added the time series of claimed OPEC reserves to Prof Goose's post at the top. If you want to bet your future on the idea that these are truthful statements by people carefully and scientifically making their best ongoing estimates of their reserves, be my guest. I can't imagine any way that hypothesis could explain those time series. The hypothesis of a bunch of liars trying to outbid each other for quota seems very consistent with the data. If they don't want to be called liars, they can damn well open up their records for audit. I think they are liars.
If they don't want to be called liars, they can damn well open up their records for audit. I think they are liars.

I don't like that logic wherever it appears.
For example, Stuart, I am beginning to wonder whether you might be engaging in some perverted activity in the privacy of your own home. Sure, you can deny it, but that's what all perverts do. If you don't want to be called a pervert, you can damn well let me install surveillance cameras in your home so I can monitor your activity 24-7. I think you're a pervert.

See how slick that works?

JD, is the world dependent on Stuart's perversion?  (lord knows I am, but is the rest of the world?)
It is true that the more important something is, and the more people are affected by it, the more transparency should be required.

I mean, should we know about the state of food production in the world? The state or drinking water? The pollution levels in the air, soil and water?

But sadly, even in these domains we don't have all the information...

the more transparency should be required

Required by who? Here's the question nobody is answering: What if the Saudis just say "No, we're not going to provide transparency. You're just going to have to trust us." What then? What's the "or else"?

that is exactly what they are doing... and may in all likelyhood keep doing. Leaving us A) without any hard data B) without any oil (unless of course you actually believe Ali Baba and the Forty Thieves).
As you live, so you judge.
That is a ridiculous analogy. Would open their records for audit (of the resource the world economy and is most dependent on!) violate their privacy? would that let us know what they do 24-7?. For the same reason you need transparency in the corporate world (would you buy stocks of a company that doesn't disclose it's accounting books?), you need it even more in the energy world.
Making an attempt at Peak Oil Education...

Where's the burden of proof fall here, JD? On those here at TOD or on Saudi Arabia? Who made the claim and therefore has got to make their case?

My condo is for sale. I suppose I could increase its value if I told you that I've done some exploratory drilling in my living room that reveals that I'm sitting on 0.5 bbo. Suppose you doubted that. Well, I guess the burden on proof would fall on me to show you that I wasn't telling a whopper, wouldn't it? Of course, I've got no history of oil production in my house but then again Saudi Arabia has published no documented evidence that they've got more oil reserves than they have recently said either. Both claims (oil in my living room and Saudi reserves) are subject to outside objective inspection and verification. I suspect both claims have exactly the same validity as well.
all you have is 0.5 bbo?  That's crap.  I have a "queen" sized field full of oil in my front yard.  

Y'all can have access to it if you keep me in power.

ca·nard  n.  1. An unfounded or false, deliberately misleading story.

With respect to my oil reserves, I am playing my cards ... close to my chest.
Where's the burden of proof fall here, JD?
Sorry Dave, I take the scientific approach. Nobody has conclusively proved anything either way about the Saudi reserves, so I remain an agnostic. Maybe they're lying, maybe they aren't. We don't have enough info to answer the question.
If you want to believe that the Saudis are lying, despite having zero evidence to back that up, be my guest. Just don't try to fraudulently pose as a scientist while doing so.
I think that's the safe position to take.

Without evidence one way or the other, the only thing we can do is create hypotheses.

One is that since the Saudi can't raise production to stabilize the market, they are upping their theorical reserves in the hope of reassuring people and calming things a bit. Kinda like saying: "Oh, you want something now? Don't worry, you'll have something good later. But for now, just trust us."

Maybe that's what's happening, maybe not. I really wish we had a way to find out, though.

Re: "so I remain an agnostic. Maybe they're lying, maybe they aren't..."

The scientific approach, OK. let's talk about that. I will spend some time on this since its important. Science involves radical claims sometimes (e.g. Plate Tectonics in the middle 20th c.) but such claims also require some initial evidence and empirical verification (via correct predictions - such claims are falsifiable). Here we get into an interesting situation. Suppose a crack (not Cocaine) team of petroleum geologists got to examine the Saudi data and fields. Suppose, based on their inspection, that it was plausible that their new reserve numbers were true. I think that would be the best we could do -- given the uncertainty -- and I would provisionally accept their claims pending empirical verification (actual production) down the line. The term "agnostic" would be beside the point, wouldn't it?

On the other hand, suppose I am told nothing and can not adjudge plausibility at all. Then I can say I have 0.5 bbo URR in my living room -- well, I won't reveal the real numbers -- and you're just gonna have to believe me or not, huh? I've got the stuff, wanna invest?
There is not zero evidence. There is excellent evidence, though not proof beyond all doubt (which we do not have the luxury to wait for). You quite clearly have not read Twilight and I suggest you do so carefully before further wasting our time. As I noted elsewhere, it documents exactly what the American companies who ran Saudi production believed when they left. There is no way to reconcile Mr al-Naimi's position with what they believed. He is essentially claiming that Saudi Arabia is going to recover more oil than the American engineers believed was in the reservoirs to begin with. Nobody has ever recovered that much oil. American oil companies may not be perfect, but they at least face serious consequences for fraudulently misrepresenting themselves to their investors. I'm inclined to believe them over Mr al-Naimi any day.
Well then, since you know from Twilight what the Saudi reserves are, why all the fuss about transparency? Why do you want to know what the reserves are if Matt Simmons already proved with his excellent evidence that there aren't any???
JD, agnosticism is not a scientific approach.  In the absense of evidence, a scientific approach requires that you are skeptical.

While it might be unscientific to claim the Saudi's are lying with only circumstantial evidence, holding a belief that they probably are would not be unscientific at all.  Occam's razor and all that.

To fail to hold the Saudi's up to skeptical challenge, in the absense of evidence to support their claim, would be utterly unscientific.

 --J