I'm playing around here because, well, it's free and almost as good as live.
http://www.wowscape.net/
If you're interested in playing around, then hop on. These servers are excellent and better managed than the actual Blizzard ones.
There are a few quirks, but overall the experience playing is pretty good.
WOWScape is a uber fast leveling server. WOWScape is a 1x server based around raiding.
The servers have several thousand people on every night and are quite fun.