Further TP2 upgrades
For the more adventurous on TP2, you can update to a third-party ROM with even later WM 6.5 and Sense 2.5, with a bunch of additional features. I run EnergyROM:
and it's been very good to me.
For giggles, you can also run Android on the TP2, though it's missing some key features up to now (Bluetooth, GPS, sound apart from during calls, for instance). See http://forum.xda-developers.com/showthread.php?t=627997 .
Must admit, though, I'd trade it in for a native Android (or Meego...) device with a Snapdragon CPU, if there were any with a decent hardware keyboard.