So I managed to borrow a Windows Phone 7 for some dev work :)
I already had the basic tools installed and had been using the emulator.
But to get the phone dev working...
- you need to install the October 2010 update to the tools
- you need to download and install the zune PC software (60MB download and requires reboot!)
- you need to log on inside the zune PC software
- you need to use the "Windows Phone Developer Registration tool" to unlock your phone
Some more help here:
The good news is... this all worked :) Took about 2 hours to get going, most of that spent downloading Zune stuff!