So last night was several rounds of login fail or server crashes. If you made it past that you were faced with a wall of lag crits.

I hopped on this morning and some differences I found:
- Undercity on the map has a new, darker color.
- Changed the quests of some of the Argent Tournament
ie, previously
Kill 10 scourge is now Kill 10 converted heroes.
Kill 15 scourge is now Kill 15 undead cultists.
Kill 10 scouts, 3 lieutenants, 1 commander is now Kill 3 commanders.

There were a few new quests from Sunreavers and two easy Black Knight quests that rewarded one and three Champion seals.

Warlock land mount cost all of 33 silver.
Paladin epic land mount cost 1 gold 45 silver (no questing required, just buy from trainer).

FYI, I am still only 6600/21000 until exalted with Argent Crusade, so as of yet still cannot see what the Argent Crusade quartermaster is offering.