I just did the 'refer a friend' thing for the 3x XP and such. My mage is on the horde side and I hardly ever use him and I'd begun to think of my lock as my 'main'. So, I decided to level a pair of alliance mages. WOW. I'm dual boxing (actually, just using 2 instance of the game on the same laptop and sharing keys with autohotkey). Both fire mages, lvl 36 now.
2 pyroblasts, 2 fireballs = dead target (+2 levels to me) and +350 XP. Simply amazing. Look out in the future though... with the 'gifting' of levels from the RAF program, there will be a lot of lvl 59 idiots that have 0 gear.
I'm still getting used to the 2 account/dual-boxing thing, but it is really fun.