Well, both WPA Enterprise and Cisco VPN seems to work pretty smoothly using the new version 2.0 firmware for the iPod Touch and iPhone.
I must admit that typing on the screen is pretty easy if you lay the iPod down. In fact using two fingers I can get quite a high speed. Though the accuracy can be a little low if I try to type too quickly. Typing one handed is not quite as good as I find that I get cramp in the typing hand from the way I hold the hand.
Anyway, this has been a good test.