So what are the combos that are working well?

I know people are running 5 hunters, 5 prot paladins. I hear 5 "tanks", so does that mean all of the tanks are viable for 5 manning? I think a druid 5 man would be really fun, all being tanky, but having stealth and stuff too in cat form. Even 5 warriors sounds like it would be crazy. I haven't played since the Monks were introduced, but maybe it'd be cool to have an zombie monk team?