We were keen to address Windows Phone 7, but unfortunately, that intention slipped out onto the public roadmap before we had actually verified it would be possible. As it turns out, the profiling APIs we use are not available for the Phone 7 emulator, so it would have meant writing a whole new profiler from scratch (with no help from Microsoft!).
We’re very sorry to have got your hopes up, but Phone 7 support is not something we are currently intending to release. We will certainly let you know if that changes.