Wow, Blizzard, you really did a good thing here. This is a fantastic idea, and I can't wait to find this feature go live. I'm such an alt-a-holic that a feature like this will help go a long way toward solving several problems. The lack of good quest rewards which cause gearing/power problems as you advance in level, as well as the silly prices people ask for upgrades on the auction house these days. I'm assuming the items linked to are not the entirety of what we can expect to see though.
Bravo Blizzard!