This project is not our own, but we will discuss it a bit and provides links to the official site where you can download it.
But I can just ID it myself?
You can, but then you may wind up with a sub-par item. You can buy/sell unidentified items on the AH as a gamble. If the item has worse stats than an item that typically costs what you paid for, you “lost” the bet. But if it’s a great weapon, you’ve come out ahead.
At the time of this entry, you can only use it for items in your pack, which gives you the advantage when trying to sell. You can check the stats, and if they’re crap, sell the item as the “mystery item” for more gold than what you’d get if everyone could see them. Or, if you see good stats, you can then go ahead and ID it and then post it for maximum gold gain.
This project is currently hosted on googlecode and can be found here.