Integrating Visual Studio Test Project with Cruise Control
From some of the initial research it doesn't appear to be a super simple solution.
It appears that doing this involves having Visual Studio 2008 actually installed on the continuous integration server, which could be a deal breaker.
Then configure the MSTest.exe to run in the tasks list, but first you'll have to make a batch file to delete the results files from previous passes as this file's existence causes an error.
Then create a xslt to format the results and put it into the dashboard.config file.
The code project article I found has a lot more detail.