after a long weekend of using mine, here's what i've discovered; it might be of some use to everyone here.
charging:
when you plug the gopro into a computer, if it says USB on the lcd, it does not charge. after uploading your video, eject the disk (on a mac, don't remember the PC equiv.) and unplug the gopro. it will beep and turn off. then plug it back in, but don't hold it's power button to turn it back on. the light on the front should beep red, and the lcd should not say USB on it. it is now charging.
after loading video to computer:
it seems that I can't format the SD card from my computer when the camera is hooked up. even if i delete the folder structure within the SD card through finder, the videos are still there when i unhook and turn on the gopro. all you have to do to get around this is format the card through the camera's interface. see the gopro instruction manual for directions on doing that.
i'll post up any other weird things i figure out about this thing. to the person who said it sometimes floats and sometimes does not... any idea why it wouldn't float? it's airtight, the camera weighs very little, and there's air inside the case, so it seems like it should. i havent tried getting mine wet yet, but i'm planning on surfing with it this summer, and it never occurred to me to see if the thing floated or not hah