Is my number one question as well, as I use Unity/MonoDevelop combo all day every day. And, as much as Mono crashes on Mac, it's still a pretty darn solid IDE overall, especially coming from bare-bones tools like Sublime & TextMate.

I downloaded this a bit ago and the install just finished; thus far (<5 minutes invested, admittedly) I'm at a loss as to how I'd even open the Unity project code, much less get the integration setup. Hopefully someone more familiar with VS & Unity on Windows may be able to provide some guidance...