My iStat temperatures are about the same, fans running at 2000RPM. According to smcFanControl, I am running at 41C.
My keyboard never feels warm unless I turn my hand over so the back of my hand is touching the keyboard. Even then I can only detect a very minute amount of heat. Even when I am playing a game, like.. uh MiniOne Racing, the heat from my keyboard does not increase despite smc going from 41C to 50-55C.
Only near the top left of the unit, near the power adapter, do I feel much heat, and mainly when I am compressing video. Even photoshop does not increase my temps much at all.
EDIT: The LED backlight has zero effect in terms of heat for me.