re: How many gallons have leaked into the gulf so far?

Well, let's calculate this and see. Deepwate Horizon blew on April 20th, so it has been spewing, according to estimates, a minimum of about 4500 barrels of HC's per day...minimum. Therefore, as of today, 31 days into May plus the last ten in April starting on the 20th brings us to a total of 41 days at 4500 bpd. Let's convert that to gallons...

(4500 barrels HC's/day)* (55 gallons HC's/barrel HC's) * (41 days) = 10,157,500 gallons of dirty HC minimum as of May 31st 2010.

Some estimates with respect to bpd are much higher than that, but there is much debate about that subject...The 15 to 70 million gallons mentioned above is not unreasonable IMO because the 4500 bpd figure is from BP. Hmmmmm, no pressure to use conservative numbers there huh?