Mattias Lindberg recently posted on the advantages of VSS over Team Foundation Version Control. The main idea which Mattias was trying to get across was the fact that TFS Version Control is simply not a viable solution for developers who are running a small operation (1 to 2 developers). In order to get TFS up and running, there are several costs and requirements which make VSS a more viable, affordable option (although it may not actually be a better source control system). The hardware, software/OS costs to install TFS can be tremendous so I completely understand where the author is coming from.

Personally, I view TFS as a software process solution which integrates Version Control into the engineering process. Therefore, personal projects which may not require all of the additional TFS features (process guidance, Office Integration, TFS Build, Work Items, etc.) may benefit more from the lightweight VSS alternative. Afterall, there is a large amount of ramp-up time required just to start to get familier with all of the features (and small issues) with TFS.