Yeah, the EC's obsession about Nabucco is just beyond my understanding

It's the same as the Persian Gulf with the US. When a large portion of your energy goes through one route, or from one country, you want to either,

(a) control that country/route, or
(b) have some alternatives

The EU cannot control Russia and the central Asian republics, so it must find another route.

Either the EU has Nabucco, or else Russia has the EU.

Well, unless the EU stops using natural gas and oil and goes only for renewables, but that's just crazy talk I know... :)

I believe it is because they are afraid of power Russia wields with it energy club. Unless they can make drastic reductions in natural gas consumption, they feel they have to get the natural gas from somewhere.