Just a little perspective...
While the BP spill is the biggest in US history, so far it's not the biggest in the Gulf of Mexico.
That honor goes to a Mexican off-shore oil well that leaked some 140 million gallons in 1979.
I figure the BP spill will probably equal or exceed that mark, eventually, if all the various capping strategies don't work.
Given that history of gulf underwater oil well leaks, how on earth did the Feds figure allowing companies like BP to bypass various safety devices and procedures was OK?
Even Alan Greenspan admits he was wrong, when he supposed that the finance industry and the markets were self-regulating and wouldn't cause any disasters because it would hurt their future. The same applies to industries like off-shore oil well drilling.
I figure this disaster has moved us 10 years closer to banning the internal combustion engine for most consumer vehicles, in favor of an electric car that is recharged from power generated from renewable resources as well as nuclear.
It is more or less inevitable.