I second the iCarbons skin. I got mine yesterday after reading about it on this forum. It's fantastic and super easy to apply. I really like it and am now going to order a skin for my iPad. It's a fantastic product!
This is the case I use with mine to keep it from scratching when I carry it out of the house. It really does fit like a glove with the iPad and the ultraslim keyboard cover attached. Its called the Graffiti iPad Neoprene Sleeve and I got this one because I wanted it in pink, but it appears to come in black, as well as a sort of army green. My husband wanted one called the Neoprene Zippered iPad Sleeve, sold by the same company, because he liked the extra storage pocket in the front, where he will put some credit cards and his iPhone. Both fit the iPad/Keyboard cover combo great!
Only thing I'd really like to solve is, the aluminum bottom of the Keyboard does slide on tabletops, bad for stable computing, and I am afaid to scratch it sooner or later while putting it down on different objects.
I actually went to the hardware stock and bought little plastic (clear) dots, that you put on the bottom of computers, lamps, etc. with sticky on one side. I put one in each corner and it makes it so the keyboard doesn't touch the desk when typing. It's pretty inconspicuous and cost less than $5.00 for a pack of like 16 of them. I only used four though. Saved the rest in case one falls off and needs to be replaced, but so far, so good.