Started out two-boxing a pally/priest, as I already had two accounts (one was deactivated). Now I have three active accounts and am RAF boosting. When I'm done boosting and 3.2 hits I'll be three-boxing pally/priest/lock.

Reason for the #, well initially I started small with the two accounts I possessed. Then the itch got me and I upped it to three for the ability to RAF boost, then decided that all teams going forward would be 3-boxed, as I discovered while leveling a tank/healer combo it took awhile to kill mobs. With a dps'er added things will die alot faster.