how do they project the results?

CNN just projected two results from South Carolina. Both had one candidate leading and the other projected to win. Did anyone learn from the 2000 election about calling it too early?

Great. It looks like Wolf Blitzer on CNN is just picking states out of a hat and calling them.

8:35pm - NBC just gave 2 states to McCain. 0% reporting in each. Maybe he came up 'heads'.