Jeremy Sinclair (a.k.a. Snickler) has created an Async CTP wrapper for the WP7 Root Tools SDK. It lets you combine the ease of use of Async CTP and the power of WP7 Root Tools SDK. I added it to the Downloads-section.

Follow Jeremy Sinclair: @sinclairinator

More on Async CTP:
http://msdn.microsoft.com/en-us/library/hh191443%28v=VS.110%29.aspx
http://blog.bekijkhet.com/async-samples-whenall-whenany-wheneverythingwithintimespan/