I received my Raspberry Pi version 2 today, and successfully installed HG on it.
I started with the 2015/01/30 release of Raspbian (which supports the new quad core processor), installed Mono and HG, and it took right off with absolutely no issues.
As you probably know, the RasPi Version 2 has a 900MHz quad-core ARM Cortex-A7 CPU (versus a single core A6 Cpu on the first version), and 1 meg of memory (vs a half meg). Not a bad deal for 35 bucks
I haven't had a lot of time to play with it, but it appears to be stable. It'll be interesting to see what the performance gain will be.
Gary Sanders