Yesterday, I adapted the code comment checkin policy for Team Foundation Server to work with VSTS 2008 ("Orcas") Beta 2. It is functionally equivalent to version 2.1.1 (download) for Visual Studio Team System 2005, therefore you configure it once for a team project, and then it is used both by 2005 & 2008. However, please note the parser doesn't yet fully understand all C# 3.0 constructs, so there might be "false positives".

Download test version here.