No problem! It occurred to me that I've never really talked about the Napster architecture or algorithms publicly.
I once hacked up Transmission to re-prioritize based on network distance. It worked rather well when it discovered over the DHT. It is a lot easier when you only have to calculate distance between you and other networks. Storing the graph of distances between two arbitrary users is harder.
The code was part of the assets that were bought out of bankruptcy by Roxio (who renamed themselves Napster). I doubt it is being used for anything.