Microsoft Visual Studio Team Explorer 2010 codename "Eaglestone" is the beta release of the Eclipse plug-in and cross-platform command-line client for Visual Studio 2010 Team Foundation Server. You can download it today from here:

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=3c9454e0-523a-4ee1-b436-5c6fc2110b34