Has anyone used one? Are they any good?

Ta

Yes and yes. See here for details….

make sure you get the wide lens

Clickety click here as well

Nice one guys. Any examples of photos?

ta

'fraid not, just use mine for vids. Take the camera for photos.

I got one on the weekend. Haven't seen footage yet but the battery life was terrible. It was coldish (8-14 degree's…yes Summer) but didn't last the day. Duracell.

Get some rechargable batteries, I think it even says on the camera not to use alkaline ones

Whats the longest video you can make with one?

http://www.goprocamera.com/index.php?area=2&productid=1

Memory: 16 MB internal, expandable to 2GB with SD card (not included), expandable to 4GB with SDHC card (not included) via free software download from GoPro website—available soon

Capacity: 56 minutes video (incl. audio) or 1,945 photos with optional 2GB SD card. 1hr 52min video (incl. audio) with optional 4GB SDHC card—available soon

Power: 2x AAA batteries (not included), lithium batteries highly recommended. 3hrs. video recording with lithium, 2hrs. with NiMH