ORC's have the AP burst racial, 15% stun duration reduction
stun resistance is no more, blizz nerfed it 3 time in the past and on WOTLK pre-patch nerfed resistance out.
TROLL'shave 20% speed attack racial for 10 sec, 10% health regeneration bonus which works in combat also, 1% crit bonus with bows/throwing weapons, 15% reduction of all impairing effects.
UD have WOTF, 2% shadow spell resist, other than that no PVP racials
BE have 2% all school spell resist which includes holy. arcane torrent to silence and regain energy
been awhile since i looked at base stats, but from what i remember BE had highest AGI and shared equal dodge with trolls.
btw.....there was a announcement by blizz that all base stats were going to be equaled out with the exception of tauren and i think orcs would get like a little extra stam.
the BGs have changed a lot, with blizz giving 2 classes abilities that were before in the 20+ and 30+ bracket the number of druids and shammies is becoming insane in 19. with a NE or BE you have 2% nature resist base to build on, and having a cloak with +15 nature resist does wonders