there have been many attempts in the past to run custom map servers. For example, sniper server and caen. We have always had little interest from the pubbers and most of our members for custom maps. We use custom maps for events and realisms, and I think thats about the right amount for this community.
I do not see a custom map server in the near future. There are plans and ideas in the works to improve our server traffic, but custom maps is not high on that list.
Regards,
Blue