Conversation so far:
How did the 2008 elections effect him?
Silver's final 2008 presidential election forecast accurately predicted the winner of 49 of the 50 states.
Who did he predict would win?
Obama is going to win.
How did he make his predictions?
CANNOTANSWER.
Are there any other interesting aspects about this article?
Barack Obama's 2008 presidential campaign signed off on a proposal to share all of its private polling with Silver.
What kind of things did they share?
After signing a confidentiality agreement, Silver was granted access to hundreds of polls the campaign had conducted.
Did he recieve media attention for his predictions?
The Washington Post featured Silver in its 14th annual election prediction contest this year, and he'll be reporting on Tuesday night's results with Dan Rather on HDNet".

Question: What else did he predict about the election?
Self-contained rewrite: Besides predicting who would win the presidency what else did Nate Silver predict about the election?