When tfs is used as a build server it builds the visual studio projects differently to the way the IDE does.
Typically it will dump all of the build artifacts into a single folder (which breaks almost any post-build scripts).
However if you are building web applications it has a clever option that builds a useful web applications folder with everything that is needed to be deployed.
This happens for any web project where the output directory is redirected.
msbuild Whatever.sln /p:configuration=Release /p:OutDir=c:builds
This is useful when you have a web site project in visual studio 2010 (say a silverlight web project) that you would like to deploy but don’t have enough space on the build server to install the right tools.
This is quite powerful but would be useful if the documentation for this was more obvious.