To make it easier to find and download, we've put the 180-day trial version of Team Foundation Server on Microsoft.com downloads. You can find it here:
The download is a CD image file (.iso), and is just over 450MB, so don't go trying to pull this down over a dial-up line.
Before you install, you'll also need the following:
- Visual Studio 2005 Team Foundation Installation Guide (do read this!)
- SQL Server 2005 Enterprise Evaluation Edition
- Microsoft Windows SharePoint Services 2.0 with Service Pack 2
Hat tip: Rob Caron