This post on the WoW forums is the first mentioning TBC items:
http://forums.worldofwarcraft.com/thread.h...=20112450&sid=1
Inside is a link to a few screenshots with items here:
http://wow.rpgbeacon.com/news.php?ID=76
Two interesting things:
1) ilvl inflation confirmed. This pretty much had to happen, but blues in the early TBC instances are looking to be ~ilvl88, which is going to be close to epics of MC level.
2) re-vamp of the crit / hit system so that as you level the value decreases. Items with +x% crit on them will be changed to have +xx crit rating on them. Your level determines how much "crit rating" per 1% crit. This way what is now a +2% crit item will be a +1.x% crit item at level 70, so you don't start seeing ilvl inflation bring truly insane crit rates at level 70
