I dropped him a line today about the Rhythmatist live set. We'll see what develops!
I know of no archive or any other official source for the music that has appeared in the vault. Which is a damn shame, since i no longer myself have access to that incredible first set of tunes. It was all over the map, including Dead Like Me stuff, pieces from Orchestralli and Taranta (finally acquired those), and several one-offs and rarities that are unlikely to ever see the light of day. Georgygirl's favorite "Louis" was available there as well.
If any enterprising soul possibly streamed and archived the material from that first page, i would sure like to add those songs to my collection!