We were using it in our team for the last week, with pretty good success. Over 30 code reviews went through it. A couple of bugs were exposed, and quickly fixed. Most importantly, the central premise held - making comments is easy, and people make a lot of them - many more than before!
So today I finally added the last thing I wanted before taking the project public - support for TFS. It seems to be working now, although I have not done a lot of testing with it.
The code is now on CodePlex!
You can read the history of the project here:
Or, you can jump in and install it from here: