I have been to Darfur, briefly a little over a year ago. I had a few folks working in El Fasher. So I have an emotional investment in seeing a solution in Darfur, as well as the rest of Sudan.
I do believe the U.S. and the rest of the developed world has an obligation to work to prevent and solve these problems. For starters, we are a signatory to the UN Charter which explicitly obligates collective action to stop genocide, through Chapter VII intervention if required. Is Darfur genocide?? The U.S. has said it is. Other nations have been reluctant to use the 'g' word for obvious reasons.
The conflict in Darfur is extremely complex. The government in Khartoum certainly bears a lot of blame, but the warring factions have their share of bad actors as well (Minni Minawi foremost among them, in my opinion).
Without elaborating here on creative ways to deal with Darfur, I would encourage those that are really interested in the topic to read John Prendergast's "The Answer to Darfur" published this past March. John works for the International Crisis Group and has spent a lot of time in Sudan. I have met him a couple of times, most recently here in DC. His Strategy Paper lays out the problem very nicely. It can be found at
www.enoughproject.org. Enough is a joint initiative of the Center for American Progress and ICG.
For what its worth, President Bush is extremely frustrated by the lack of progress on Darfur. He believes in most of John's recommendations and was ready last month to go much further until the UNSYG told the U.S. to hold off as the UN was still trying to get the Sudanese government to play ball on a UN force taking over from AMIS.