On what extra stuff you have added changed/added/removed to improve the features.
I figured with quite a few people having bought one it would be a useful thing to have (and I'm getting mine on Friday).
I plan to stick a 4gb SD card in and keep the native OS for now (maybe migrate to another linux distro at a later date) and was looking for useful stuff for it, like software, tips to improve performance etc (possibly dual boot XP off a USB stick at a later date)