No more public coop?

[jamz]

Yes, 1.1 servers have co-op voting diasabled for non-admins by default, although I believe this may change in future releases. There are servers which have it re-enabled, but another default setting is for servers to deny votes for maps they don't have. You could try to /sendmap yourmap first, but the server may not have an 'incoming' folder, with write permissions, thereby disabling this ability.
My match server:

[SELECT ALL] Code:

/connect 194.0.252.233 20000 match

...allows all of the above, plus the ability to private the server (/mastermode 1). There are others, but I cant recall any details right now.