install nitdroid, meego snapshot, easy debian and show gimp etc.

excuse me but what are you trying to get as answer?

btw. You do not need to jailbreake anything.

.edit
stream webradio and send it with fm transmitter to car radio. play games with tv-out, show mypaint with pressure sensitive brushes. Actually if you really need to ask this kind ofquestion then you probably have totally wrong device in your hands.