I hate to bring sunshine and daisies to this doom fest but here it goes.
Yes oil will spill. No it will not end soon
yes the toxic agents and gasses are worse than the oil
but this isn't nauissca of the valley of the wind. And the world will move on.
Nature will cope and adjust. A few people will die some will be born with birth defects yet in the end it will work out fairly well.
No the biggest issue and threat I see is the government using this as a distraction and or excuse to pass more restrictive laws and indeed serve as yet another moral equivelent of war for their side.
Some perspective about the ammoujt of oil spilled. It isn't even enough to have filled a quarter of the super done in new Orleans. It just spreads real thin.
Everyone should take note of the purposful delays to the clean up effort. This is being made worse to become a crisis that can be used.