Presumably you can re-activate it again, using the original product code, and obviously the same device code (IMEI, as I found out because I had to use the 'manual' method - the automatic one froze the application). I guess it would barf if you then tried another IMEI. But if you wrote down your activation code you shouldn't even have to go through that process again. I wrote down where Documents to Go stored its settings.. can't find it now, but I have it somewhere. But if you wrote down your activation key it should be just a question of re-inputting it.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...