Okay, they are getting hard to keep up with. The Centinel Wheel is $899 on the Kickstarter campaign, but it does not inspire much confidence when the poster bike has the front forks mounted backwards. (To be fair, in the video the fork keeps reversing. It's very disconcerting.) It does have two electric motors, 360W, and a 24 volt battery. They plan to ship in April. ;-)
You can learn more in this Gizmag article:
Centinel Wheel makes bikes into e-bikes
May we all end up with the powered wheel we deserve, or something like that.