Jeffrey Fredrick just announced that CruiseControl 2.7.2 is now available for download: http://tinyurl.com/2zm9mz.
There are lots of bug fixes, lots of changes to the Dashboard and some new plug-ins, but the bit that is of most interest to me was (from the release notes)
TeamFoundationServer source control ---------------------- * Fix compatibility with Microsoft Visual Studio Team Foundation Server 2008 (CC-735). Submitted by Martin Woodward.
This was to work around an issue that came up when using CruiseControl (java version) to talk to a TFS2008 server (TFS2005 worked fine and still does). If you are attempting to use CruiseControl with TFS 2008 then you should go with CruiseControl 2.7.2. For that matter - if you are using CruiseControl.NET with TFS then you should also take a look at the latest release of the integration to TFS - as that contains the same fix allowing you to happily talk to a 2008 version of Team Foundation Server (also using the TFS 2008 client API's).
Anyway, congratulations to the CruiseControl team on the 2.7.2 release!