This is the thing I've been busy with for the past 18 months, over which it has grown from a skunkworks project into a real-world product. This is going to be my first microISV and even if it's a colossal commercial failure, I'm looking forward to the experience of product development.To ship HgLab, I first effectively rewrote Mercurial Core in C# (https://bitbucket.org/hglab/hgsharp), and then built on that to first deliver a bare-bones read-only repository browser and then a full-fledged Mercurial Server.
I'm open to any kind of feedback. And wish me luck!