HEY! I've used Camerupt in OU! Drilbur on a Rain team is a better use of a team slot than Camerupt.
Trapper Teams are pretty damn viable in OU. Especially considering Tyranitar's most used set is in fact a trapper set. This may be a 4th Gen team but it does the best job of explaining exactly how a Trap team works.
http://www.smogon.com/forums/showthread.php?t=40480
I'm aware Rotom-W shits all over that team, but it's just an example. I'd love to see someone build upon that premise as it's a very good gimmick. I'm sure there's a lot of better Pokemon to use than Weavile & Uxie now. Hell throw Scarf Tyranitar in Weavile's slot & you could easily mold it into a Sand team.