Yesterday:
Today's shut-in oil production is 1,356,498 BOPD. This shut-in oil production is equivalent to 90.43% of the daily oil production in the GOM, which is currently approximately 1.5 million BOPD.

Today's shut-in gas production is 7.866 BCFPD. This shut-in gas production is equivalent to 78.66% of the daily gas production in the GOM, which is currently  approximately 10 BCFPD

Today:
Today's shut-in oil production is 1,327,953 BOPD. This shut-in oil production is equivalent to 88.53% of the daily oil production in the GOM, which is currentlyapproximately 1.5 million BOPD.

Today's shut-in gas production is 7.248 BCFPD. This shut-in gas production is equivalent to 78.66% of the daily gas production in the GOM, which is currently approximately 10 BCFPD.

Ben also caught a couple of other things (moved up from the comments:

Also, for reference, here's easy access to all 2004 MMS reports regarding hurricane damage / shutins / etc. It's interesting to note that a weel after Ivan hit, by Sept 22 (it hit on the 14th), shut in was listed as 34% of oil and 19% of gas. Also note that just a year ago they estimate 1.7 Million BOPD and 12.3 BCFPD for oil and gas, respectively (clearly production has declined a lot just since last year). Also I think it's important to note that they footnote their shut in report with "** Shut-in production rates do not include production lost due to the destroyed platforms." So if the platform is gone, the production has been lost (from the 1.x million BOPD estimate) and not just listed as shut in. I wasn't aware of that.