So Obama won more states and more delegates, and tied for the popular vote. Although we lost California, we're calling the night a win overall. For a challenger up against somebody with huge name-recognition, a split decision on the night when Clinton was expecting to sew up the nomination is a big win for us: even with Clinton's superdelegates (senior party members, who can change their votes at any time) her lead is now less than 100 delegates out of over 4000, less than a 3-point lead.
But now all the other states are important too, so here's when to pay attention:
All the momentum is with Barack now. Go-bama!
Update: Thanks to Ade for pointing out that Obama at least won San Francisco, 52%-45%.