So for the day that would be +3 for sure, with an additional 2 possible (the Nevada add-on and Yvonne Gates).
As you can see from the chart in the sidebar, assuming he splits the add-on superdelegates, Obama already has enough delegates locked down to clinch the nomination at 2,025.
There's something anti-climactic about the delegate math at this point, however; everybody, including the the Clinton campaign, knows its pretty much over. Right now we're in the transition phase to having a nominee.
My best guess (and it's purely a guess) is that once Michigan and Florida are resolved, giving Clinton a symbolic victory, she'll concede the nomination and endorse Barack.
Update: Carthage reports another superdelegate from Colorado as well as a very cool stat: Barack has now pulled even with Clinton among the DNC superdelegates (these are party officials, as opposed to Reps, Senators, and Governors). He's been in the overall lead among superdelegates for several days now, but the fact that he's now leading among the party insiders is more proof that the nomination is essentially resolved.
Update 2: Just to clarify my comment about Clinton and MI/FL -- I wasn't suggesting that the race isn't over until that happens. It's the exact opposite, actually -- I think it's basically over now. He won't officially be the nominee until late August at the convention (that's just the rules), but I think just about everyone finally understands that he will be the nominee. So I'm assuming that on Tuesday when he secures the pledged delegate majority (even counting MI/FL), he will declare that he will be the nominee, and I don't think anybody will dispute that. Clinton will plod along, focusing her attention on Bush. I would be very surprised if she did anything else damaging for the rest of the nomination process. That doesn't excuse the past.. My only point is that I'm not really worried about her causing any more problems from here on out. Then again, I've been wrong about that before!