As a heads up to anyone planning on going to the 2008 San Diego Comic Con, the four-day passes are now sold out.
(As in, no more of them are available.)
You can still buy the individual one-day passes. If you were to buy all four days this way, it would currently run you $110.
That said, the individual passes for Saturday are nearly sold out.
You can read more at the San Diego Comic Con site.