I now have several idevices with me. All of them are jailbroken. I got my ipad on saturday and I had it spirited on sunday.
The reason i do it(now that stanza for ipad is out):
SBSettings: There is severe lack of hardware buttons. So if the home or the power buttons were to be damaged, I am in a soup. My 1st gen itouch was almost unuseable. Apple refused, but SBSettings saved the device.
AppLinks: Get simple names and path for your apps.
FinderMobile/iFile: Browse the i-filesystem. copy move, edit etc.,
ProSwitcher/Circuitous(not very good for ipad at the moment)
VoipOver3G, Full Force, etc.,: I can play full screen chess..
and many many more.
My next try will be to put a full C/C++ compiler inside the ipad. It can be a good prog device: just to see if i can learn i-programming..
Hats off to Apple for good devices and Dev-Team for making them great..