As promised by Philo, the PF motor specifications are now made available. They can be found in BrickJournal 8. A total of 5 pages are dedicated to the new PF system. Thank you Philo, Didier Enjary, & BrickJournal.
UPDATE: Power Function sets are now available! Here are the set numbers to look up at LEGO.com: 4957 (the "Ferris Wheel") and 4958 (the "Monster Dino").