Touch is really good except its PDF performance.
There is already
a good attempt for kindle 3 and dx. I wish someone would start to port it on Touch. I'm ready to make some donation if necessary and I think many others, too.
BTW: I think it would be much more appropriate to use the existent one on Touch since it has many shortcuts and it is really easy to use a menu with high number of items on a touch screen
Touch users: Don't let this thraad get buried