there tones of things you can do to your phone,

get latest firmware
apply patches, improve the functionality of the phone
- add functions
- add features
- remove unwanted features
apply elfs, these are advanced patches
load flash menues, screensavers
change drivers of your phone
- change camera driver
- change accoustics (sounds)
- change dispaly drivers

******** LOTS MORE *******

keep an eye on the forums, really some cool stuff