In principle I want to root my Desire HD, from a purely tech curiosity viewpoint, but I can't think of a valid reason yet.

It has heaps of internal memory, you can run things from the SD card if you want, it doesn't force close...

(plus, it appears that there is no way to unlock it - currently it is T-mobile branded - without going to a dodgy corner shop and letting them plug it into something. T-mobile won't do it for me)

happy to learn if it is really easy and if there is a killer app :-)