I just received mine, and am very pleased.
Here is the link to the details:
http://www.incasedesigns.com/DetailIpodSleeve2.php
I bought mine from the Apple store, which had slightly cheaper shipping.
http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/70202/wo/374QvROVz49v35jPd7UBcU69MGc/2.3.0.5.8

For the price (about $5 cheaper than most leather sleeve-style cases) I expected it to be of lesser quality. It is the ONLY available leather case at the moment as well, and one of two or three cases available period. The packaging, and appearance looks very similar to the original iPod case that comes with the 15 and 30gb models. The difference is, this case is made of very nice napa leather on the outside, and very soft suede on the inside. I tried slipping my ipod in and out several times, to make sure that it's not scratching it, , and sure enough, it doesn't. The suede actually has a polishing effect, getting rid of finger prints. :) The product is not entirely leather. The tiny portion that attaches the front portion to the back is made of stretchy nylon, to make if form to the iPod better. It fits extremely well, and feels very solid when the iPod sits in it. Absolutely no worrying about possible slip outs. The belt holder in the back is also covered with leather. The top is open, and everything is easily accessible. The bottom has a opening allowing for the firewire cable to be plugged in with the case on. There is a clear plastic shied over the LCD, but the touch buttons, and the wheels are exposed (this is not obvious by looking at the pictures. Overall, I am very happy with the purchase, and would recommend this case to anyone seeking a leather "sleeve" for their iPod. Hope this little review helps.