A big win for Obama, built mostly on higher than expected support among blacks (80 percent). Among whites, he's getting about a quarter of the vote compared to 38 percent for both Clinton and Edwards. Going forward, Obama still needs to find a way to expand his support among white voters.
It also seems that the Clinton-Obama fight worked to the advantage of the Edwards campaign. Here is the vote by when people made up their mind:
When did you finally decide for whom to vote in the presidential primary? (Last week or earlier than that)
Last week: Clinton 20, Edwards 27, Obama 51
Earlier than that: Clinton 30, Edwards 15, Obama 55