I've been discussing this passionately on a WoW forum I belong to. There are several threads, all worth reading IMO.
http://www.warcraftcentral.com/forum...9&page=1&pp=10
http://www.warcraftcentral.com/forum...ad.php?t=11452
http://www.warcraftcentral.com/forum...ad.php?t=11464
The Alliance race is still to be disputed. But it seems Blood Elves are in for Horde.