Gorgonnash (US), right now no one is raiding for obvious reasons; no guild has completed Naxx (a few are close) yet as most are still in MC/BWL/AQ40.
The queues for BGs are around 5/7/15 mins for WSG/AB/AV respectively, there are a few PvP guilds on this server as well.
I can't really comment on the Horde vs. Alliance ratio, but it doesn't seem lopsided for either faction right now.
This is the only server I have played on so I can't say how it compares to other servers.