First of all, I love it! Over the past few weeks I've been re-building an application in MVC3 which hasn't been updated in 8 years. When it came to the forum I had a look around at open-source solutions, but nothing was any improvement over the forum I had built almost a decade ago! Discourse is definitely a huge improvement, and I for one will be including this in my application as soon as I can get hold of the code :)