The tally was based on public declarations from delegates as well as from another 15 who have confirmed their intentions to the AP. It also included 11 delegates Obama was guaranteed as long as he gained 30 percent of the vote in South Dakota and Montana later in the day. It takes 2,118 delegates to clinch the nomination.
Figured JTapp would appreciate this:
Welp, that's pretty much it. Now McCain has something to focus on. This should be interesting.