If you have developers that work from home or work as individuals in an office, you may want to check out Teamprise's latest tool, the Remote Accelerator.

The proxy service that pairs with Team Foundation Server is designed for remote development teams, working reactively to cache version-controlled files.  The Remote Accelerator is designed for the remote individual, proactively downloading and caching files for that developer.

It was just announced at PDC 2008, and you can read the announcement here.