XUnit doesn’t support yet to run tests on Resharper 4.1 so I decided to build a home-made release.
You can download this XUnit package tested with Resharper 4.1 and with TestDriven 2.14.2190. This is not an official release, you can get the official one in the Codeplex page,use at your risk:
Patrick Smacchia sent me this link where NHibernate 1.2.1 GA and 2.0 GA are analyzed with NDepend.
I want to you appreciate the analysis made with this tool, to see how much of details it offers to build comparatives between both releases. What I consider the most important is the analysis of the changes made. You will see in the picture with the blue zones, all the refactored parts, and you can arrive to conclusions 
I was waiting this release from the Db4o for long time, and the people whom folow to Db4o I think as well.
For the people that are not so familiar, Db4o run onto Java and .Net Platforms. The main development is made at Java, and then using this amazing tool: Sharpen, they make the conversion to nice C# code, although Db4o.Net is not 100% converted, the most part of it it’s.
I hope it helps !