I don't have ovi contacts either... are they just releasing the same firmware with a hex edit to change v20 to v30?
My battery life seems to be the same. It still sometimes tells me it's full and when I power it down and back up, it's magically at 3 bars. If you have Garmin XT on it, I'd recommend removing it. I tried it and it was draining my battery like crazy - even when i wasn't running it, I ended up doing a subscription with ovi maps instead.