Underbog boosting

[Schwarz]

You may also try Karazhan.
http://www.youtube.com/watch?v=22Av9qxu89s

If you listen to the video he says no one is getting XP the only thing he said about bringing lowbies into kara was about gearing them up. So Kara <> XP

[cryinsham]

you do get xp in kara at 68+ he said they werent because he was there with 3 other 80's

[Schwarz]

http://www.wowwiki.com/Formulas:Mob_XP

(elites in instances give 2.5 * XP when solo-ed; untested for normal mobs in instances - Stilpu) (confirmed zero XP at lv 58 in Molten Core, at lv 69 in Karazhan and Zul'Aman. confirmed XP gain in Zul'Gurub when a lv 56 dinged 57 but exact amount earned is unknown - Ishotala) (Some monsters, like in the Amphitheater of Anguish, give the doubled exp PER player. If you do those quests with less than five players, you'll get more experience than this formula. The total amount of exp they deliver is 10 * normal_XP. Has to be confirmed, through. pikachuyann)

So wowwiki is usually dead on with most of the information. Did they recently change this?