It looks like there’s a ROM download to allow an HTC Touch Pro 2 (Tilt 2 for AT&T customers) to dual boot both WM 6.5 and Android.
http://pocketnow.com/tweaks-hacks/android-update-on-the-touch-pro2-it-rocks
There is the potential to brick the phone, so I think I’ll wait a while before trying it.