RR - I think the battery life is rated at up to 10 hrs in training mode and 6 weeks in watch mode.
i had not mentioned the Recovery feature. About a mile or so into a run it tells you how well you have recovered since your last run, and at the end if a run it tells you how long to rest before your next run. Interesting, but will likely be ignored as I have a schedule to keep!
On the footpad thing: I have been trying out the new Garmin 620. It has the accelerometer built into the watch itself (as does the new 220). It no longer needs the footpod when the GPS signal is lost as the accelerometer takes over.