What is the deal with docking connectors? I've seen Rob imply that there's no possible source, but that's all I've found. What's the long winded "VH1: Behind The Docking Connector; The Inside Story" explanation?

I've actually got an extra sled that I'm not usuing at the moment, but it seems like it'd be nice to be able to get extra docking connectors for various projects.

Matthew