Berenger "zor" Fish's .plan has word on Spool, his new map in the new just-released version 1.06 patch for Sin (story). Here's the skinny, which mentions the map's lack of Internet-friendliness:

As you may have noticed in the 1.06 patch, that I decided to release "Brain Pain", or spool.bsp. This was a map that I had fooled around with back.. well let's see, the .map file for this bit of wackyness is dated December 4th, 1998. It was only a few hours to make, but I figured why not have it see the light of day. Be forewarned, spool is probably not very internet friendly. I imagine it would be quite insane with more then 5 people.