How seriously do you take Bono?

He spoke at the National Prayer Breakfast last week. CNN has this story. I am more or less in the tank for the guy. I think he has done a tremendous amount of good. But I am not quite certain where he goes from here. I admire his willingness to work with the people who have the power to make things happen, even though he finds the ideology that some of those people embrace distasteful. I think that speaks to a seriousness that too few crusading liberal celebrities possess. But how long can he continue to make nice with unresponsive governments before he begins to lose credibility?