Does a Snow Leopard reinstall require rebuilding my Development Environment?
If you are wanting to just reinstall Snow Leopard on top of itself, running the installer from the disc will not wipe out your development environment. I've done this myself with no issues.


Be sure not to pick Erase and Install. Archive and Install is not what you want either. You essentially want to do an upgrade (can't recall what the exact option is at the moment, but I'm pretty sure it's the default).


Of course, always run Time Machine anyways in case something catastrophic happens.