I recently found an issue when debugging WP7 project on the device from Visual Studio 2010. I can't seem to start WP7 camera when connected to the computer. After trial and error, I found out that when connected to Zune, all the media capabilities on the phone just simply doesn't work. A bit of a conundrum since I can't debug if I don't have the phone connected to Zune.

I then found out from Stackoverlfow that the SDk comes with a command line tool to connect to the WP getting rid of the need to use Zune completely for connecting the phone

C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Tools\WPConnect\x64\WPConnect.exe

It then work like a charm.