Barack Obama is for all intents and purposes the Democratic nominee for President of the United States. NYTimes.com has the numbers as 56% to 39% with 9% reporting as of 10:52pm ET… and as reported earlier, he’s passed the delegate threshold needed to go up against Republican John McCain in November.
UPDATE [...]

Hillary Clinton has won the South Dakota Primaries, with the NY Times having the totals as follows (updated 6/4/08 with 100% reporting):
Hillary Clinton: 54,179 votes, 55.3%, 8 delegates won
Barack Obama: 43,726 votes, 44.7%, 7 delegates won
With the same % reporting, John McCain wins the GOP contest with 70.1% of the vote (Ron Paul finished [...]

We’ll have an update once SD and MT’s results are in, but unless something extraordinary happens between now and the conventions, it’s as close to official as you can get: Senators John McCain (R-AZ) and Barack Obama (D-IL) are the two major party candidates in the race to be 44th President of the United States… [...]