NCover 2.0.2 + TestDriven.Net 2.9 on 64-bit Windows
Peter Waldschmidt of NCover fame has recently pulled together a team of developers under a new company called Gnoso. They have been working in conjunction with Grant Drake on enhanced versions of NCover and NCoverExplorer (now combined into a single tool suite). These have been in development for many months and there are lots of new features and stability improvements. Rather than try to summarize here, I recommend you read what Grant and Peter have to say about the new NCover 2.0 and NCoverExplorer 2.0 versions.
If you would like to use NCover 2.0 in conjunction with TestDriven.Net, you will need to install TestDriven.Net 2.9 or higher. If NCover 2.0 isn't installed then TestDriven.Net will use the original NCover 1.5.8 and NCoverExplorer 1.4.0 versions. When NCover 2.0 is installed, TestDriven.Net will default to using the enhanced 2.0 versions. This version should also work if you are using TypeMock.
To perform code coverage on 64-bit Windows using TestDriven.Net, you will need to install NCover 2.0.2 Enterprise or higher. There was a compatibility issue with the original NCover 2.0 release, which prevented it from working when launched from TestDriven.Net. This is fixed in NCover 2.0.2.