Been testing the bold for the company i work work. Excellent Device all round.
RE battery life, if you leave it on 3G mode then yes the battery life is about 1 day, but leave it on 2G mode, you will get easily 3 days out of it. Mine is constantly on and never had one issue with it. Video playback is excellent and also the device feels really good in your hand. Very nive finishing too!!
Be aware though the new Curve 8900 is out soon!! Should be a good replacement for the current Curve.