I have been able to tether using my Pre2 and iPad2. I paired both and since the Pre2 has PAN services, I was able to access the internet on iPad2. Initially, I had the freetether application, however, I noticed the speed was not great. Although it worked, i did not like the speed. So I'm sticking to Bluetooth tethering for now.
Question, anyone out there was able to do/test with a Touchpad?