Battery life? Anybody with a pre-release model care to comment?

Eldar said "in practice it proves to be more power-hungry than the N97...but don't forget we got our hands on a proto..version"

The higher power CPU and higher resolution screen (over the N97) pretty much confirm what he says without ever having held the device (laws of physics and all that) but I wonder can it survive a day of heavy usage without re-charging? That would already be fantastic.