Well, I've taken the plunge and flashed my vario II to WM6.
The good news is it has fixed the 'keypad tones' issue I mentioned in http://www.modaco.co...et/#entry813474
, while not re-installing the T-mobile SIM lock.
"Wireless Modem" has gone, replaced by "Internet Sharing", which works with a few tweaks (such as moving up to ActiveSync 4.5).
I also noted that I no longer have an 'HTC USB modem' recognized, but I saw in the 'new hardware' dialog ' HTC USB Sync' (which was installed as part of the RUU update/flashing programs).
It seems now to be part of a Local Area connection and things are measured in 'packets' - that is to say I used to connect via a DUN connection using the HTC USB modem, and that has gone, replaced by a network adaptor "Windows Mobile-based Internet Sharing Device"
1) Should I have expected this, and
2) Can anyone tell me how to get back or otherwise provide the 'data uploaded and downloaded' counter that used to appear as part of the session dialog?