I agree that is a problem.
On a slightly different note, having two strong candidates is a boon to progressives. If one of them and Hillary bloody each other up then we will have an unblemished candidate to take the lead.
If Edwards and Obama play it right then they can constrain Clinton's ability to negative in the first place.
The nicer Edwards, Obama, and their supporters will be to each other, the more successful everyone will be all around.
I'd be thrilled with either Edwards or Obama,
I think really the Edwards and Obama campaigns draw strength from each other in a lot of ways. If nothing else I think both benefit from being on a field with two strong progressives and one strong DLCer, instead of the progressive candidate having to stand alone on everything. In brief neither Edwards or Obama have to waste time fighting to establish the progressive-flavored agenda as legitimate, they can focus just on pushing that agenda.
It's funny because although the netroots supporters of Obama and Edwards are at each others' throats all the time and seem to generally see each others as adversiaries, the actual campaigns of the two candidates don't seem to have this problem or act as if they have this adversarial mindset toward one another at all.
