This weekend there will be two WordCamps: WordCamp Phoenix and WordCamp Indonesia.
WordCamp Phoenix has already started, spread out over five days with workshops all over the city, a GPL debate, an all-star cast of speakers, and a core contributor workshop on Sunday to help potential volunteer developers to the WordPress open source project ramp up and get involved. Keep your eyes on WordPress.tv after the event is over, as all the session videos will be posted there.