Hosting Custom Maps?

[jyim89]

I was wondering if there is a way to host custom maps now that the map editor is out?  I would like to see some fun ums on beta now.

[Deagle]

Try searching http://sc2.nibbits.com/maps/

[jyim89]

I did but there are no multiplayer ums.  And even if I find one, how do I host it on bnet?