HTC Tilt 2 -- possible to get Android on it?
It is possible, however as you mentioned it is not completely compatible yet. Some hardware pieces like the camera (and I think speakerphone) will not work for the ATT T2.

Check out the XDA-Developers forum, specifically rhodium (what our phones are) for more info on the Android developement &amp; cooked winmo ROMs.I don't recall of the top of my head if you need to run Hard-SPL or not to boot into Android off the card of or not, but if you do need to, that'll void the warranty. 

Although, in my opinion it's worth it to at least go with a cooked Winmo ROM or Android... even if it voids the warranty.