Josh Marshall makes some interesting points on why Howard Dean may not be "the man" just yet. In summary, his main point is that the Dean electorate while united, does not necessarily reflect the party at large, and as the field narrows that will become more evident. Read the whole thing here, and John Judis' response here.
Honestly, I haven't made up my mind yet, and expect the field to be significantly narrowed by the time we get to the California Primary, which should make my life easier. As it stands I could live with Dean, Clark or Kerry, but expect my choice to be between Dean and Clark. To coin a phrase, stay tuned.