Even if you're not physically attending Google I/O, the official convention app might serve you well. It allows attendees to scan badges, view schedules, and just guide themselves around with vector-based maps. If you're not going to be in Moscone Center tomorrow, you can stream sessions with the app. Waiting just about as long as possible, Google has pushed an update to the I/O app, and it adds some cool stuff.
Here's the full changelog: