I was one of the unlucky that was able to get EA but had massive technical issues getting AoC to run. I added some hardware recently in anticipation and I've been slamming the system with Crysis and Fear at full trying to get it to break but it ran pretty dang stable. Fast Forward to Saturday and this was me:
"remove eyeballs from socket"
"place eyeballs on desk"
"proceed to scream gibberish at the screen"

(Credit goes to someone on the AoC forums for that one. He was having problems too.)