We shipped yesterday (March 18) and it appears that both the Workgroup Edition and Trial Edition are now available for download! That didn’t take too long. Enjoy!
Remember, if you install either edition, you can upgrade to Standard Edition by running setup in Maintenance Mode and providing the correct product key. For those who obtain Standard Edition through Volume Licensing, the process for finding your product key should be the same as with any other Visual Studio product. For more information, see Upgrading from Visual Studio Team Suite for VL Customers.