Great work, this is really cool. A couple of thoughts, idly:

- 'Xamarin Studio' just a new coat of paint on monodevelop, but it has some nice things in this version; new ui, the autocomplete especially is vastly improved.

- Seems a bit laggy on my mac mini for some reason, which is a bit disappointing, but works fine on my imac. Both mountain lion, so who knows?

- Still no PCL's for macs. :( sigh (yes, you still need to have a separate project for each platform, which includes all the same files).