Benjamin Day Consulting have a $25 tool - "Dubbelbock TFS 2.0 lets you access Team Foundation Server (TFS) source control from Windows Explorer (explorer.exe). Now you can go to any file in an existing TFS Workspace, right-click and you'll then see the Dubbelbock TFS context menu with options like Check In, Check Out, Undo, and Get Latest." Could be very useful for document management. I've had a play with it and it seems to work fine - the only issue is that on some machines there is a problem with installing it :-( . It seems to install ok on Vista machines I got people to try, but not always successful on WinXP. I contacted the author and he's aware of the problem - offered me a free copy if I could find out what is "missing".
It also has a system tray utility that allows you to create "stencils" for work item types, and then create / edit work items using the stencils. This functionality is similar to the Codeplex project Fissum. As Microsoft have now released the Visual Studio 2005 Team Foundation Server Power Tools, which includes a work item templates feature, it's probably a better way to go.