Bounce back: How much will online ad revenue rebound?

Safa Rashtchy of Piper Jaffrey predicts that online advertising revenues will sharply accelerate in coming years, to more than $15 billion by 2008. He also predicts that online ad revenues will match 2000’s number of $8.1 billion – the height of the boom – by next year.
John Battelle says he’s wrong.
I agree with John.
Anyone want to bet?