For a little bit of fun for my next dive trip,today I purchased a GoPro HD Hero. This is a tiny HD digital recorder (42mm x 60mm x 30mm) that records excellent quality HD (1080p = 1920×1080 pixels (16:9), 30 fps, 15 Mbit/s data rate) that you can clip or mount to any part of your Scuba rig and record a complete dive from start to finish. A 32 gig card will record approx 4.5hrs of footage.

The housing that comes with the camera is waterproof to 30 metres, I have upgraded the housing so that it is waterproof to 60 metres and has a flat lens port for sharper images. So, you can all join me on my dives in the Maldives in a few months, I have brought a mount that I can either use on my shoulder or use as a head cam, so you will see what exactly I see whilst I am diving. I'm looking forwards to showing some awesome reefs and dives that are out in the Indian Ocean.
Here is the GoPro website, I think for the size, fantastic image quality, and the absolute bargain cost of the cameras, these are a brilliant little invention that will be seen all over the place.
http://gopro.com/videos/