If I understand their broken english correctly, the very first system, available early 2007, will have Watts available. Its just that we have to wait til the end of 2007 for it to be 100% accurate. Whatever that means...
My guess is that they have a power measuring system similar to Polar that will send wattage numbers wirelessly to the computer. Its a pretty cool gadget, especially if the price is right!
I'm still looking forward to the Revloution coming out and hopefully I can sync it with my EDGE 305. GPS, HR, cadence, Watts, speed, time, laps, elevation, grade, .....