My ST2220T touch does not work properly. I know that it is close to working because if I use two fingers on the desktop, I get a highlighted box (not exactly where I'd expect).
On the other hand, Fedora 17 supports the ST2220T (I think Fedora 16 did too). I have not tried multi-touch gestures with Fedora.
All tests (Fedora and Ubuntu) have been done without tweeking any settings.
I wonder what is needed to make it work under Ubuntu.
Mini review: I really like the display -- IPS is better than TN. The speakers are not very good. I wish that the back had VESA mounting holes so that I could mount my nettop on it.