Here in Oregon the TV advertising is starting to get very heavy, especially for Obama. It appears he may be trying to set up the campaign to effectively "declare victory" after this primary, arguing that his delegate total is greater and superdelegate total about equal.
However I'm inclined to think that both campaigns are going to settle this at the convention- probably in an amicable fashion and probably with Obama as the victor although skeletons in the closet could still rear their ugly heads and totally derail either campaign. This election is in the hands of the superdelegates now and it is not at all clear how they'll respond to the circumstances.
The Democratic party really should be ashamed to have such an un-Democratic process for choosing candidates. Although there are a handful of justifications for having "elite" voters with much more power than regulary people, the notion flies so flagrantly in the face of true Democracy and good elections practices that it's surprising the party hacks didn't realize this would create problems in a close election.