Came across and thought it might be useful to someone:
http://lifehacker.com/387380/turn-yo...a-super+camera
Basically its a completely safe firmware update (doesn't make any permanant changes, and you can just reset it to clear) which adds loads of new features such as:
1. custom overlays (i.e. more info) for the LCD viewfinder
2. raw picture mode
3. motion capture
4. custom scripts
5. bigger file sizes.
Enjoy