frost: I currently don't include the bin folder as part of the project build, as such it doesn't get written to source safe either. I'll give your suggestion a try and see how it goes.
An alternative to included the bin folder is to create an "ExternalComponents" folder (sibling or similar to your solution's folder). Place all external dependencies that are not part of the solution and not part of the core platform (i.e. .NET / Windows) here. Projects then reference into that folder.
When you outgrow VSS to something better, you can looking at branching of External Dependencies along with your solutions when you release to allow new development work on newer versions of those components (while support continues with what you released).
Richard