I was at the store EARLY on the 21st. When I got the phone, it had a little bit of charge already on it (2 bars-ish). I went into the office and put it on the charger but, played with it (while it was charging) the whole day. I got nothing work-related done that day.
When I first got mine home at about 7pm, I could NOT put it down. I sat on the bed w/ my laptop messing around for 5 straight hours. I would recommend letting it charge for several hrs if you can b/c for the first few days my battery power sucked bad. The next day it was dead by mid-day even after a sev hrs charging (once I finally went to bed). It caught up after a few days and now the battery lasts all day but still, I'd charge it first, if at all possible to keep your anxious hands off of it :-)