Apple announced the availability of its official WWDC app last week. The app has a schedule of conference sessions from the start of festivities this morning until the closing bell on June 11 at Moscone West. The list is searchable and sorted by date, with a choice of events that are currently in progress or events happening later.
The app has a favorites list that attendees can contribute to, and will provide updates on what's new and exciting throughout the conference. If you're not familiar with San Francisco, need to find parking, or need to know how to get between Moscone West and the Apple Store, there's a Places tab in the app with helpful information.
The free app is only available to developers who are attending the conference. To download it, go to http://developer.apple.com/wwdc/app -- you'll need to log in with the account that you used to purchase your WWDC ticket.