I've seen that O2 have provided UK users with an update to WM6 but there is no talk of this happening anywhere else in the world, which is pretty dissapointing in my opinion. If I did buy one I could risk it and try flashing it with the UK rom, but it might leave me with a brick - I haven't seen any sucess stories from AU.
Anyway, the big question - would you buy one again? I really want a WM based device for the seamless sync with Outlook and the like. I used to have a Qtek 7070 (old school now) and it had its fair share of problems, but overall it wasn't too bad.