[haus]

If you happen to use Exchange 2007 there's a remote wipe capability baked into the web client. There's also a program called remoteProtect (I think) - not sure if it's compatible with the TP - that allows a full wipe based on a text message. Back in the day you could bake it into a custom ROM so even a hard reset wouldn't remove it. There's also nuegpssecurity...I'm not sure if it has a wipe capability or not.

Edit: I know there are others...those are just the ones I'm somewhat familiar with. I see SmartPhoneTracker mentioned a lot as noted above...do a search and see what comes up. I think MightyMike bakes nuegpssecurity into all his ROMs, but I'm not positive...