Comic-Con International Offers Free iPhone App
It basically provides all the information you would normally find in the official Comic-Con International program book, including maps of the halls and exhibit floor, program schedules, and a news feed without having to lug around that heavy program. Plus the programing line-up and exhibitor listing is easily searchable, and the maps are multi-touch zoomable (of course).
The application is available on iTunes.
In addition, iGoogle will be sponsoring free WiFi for SDCC.