Thanks for clarification. I meant to throw that in there. Is a great case.
I agree. It's what I use. But the term "keyboard case" as in this thread can be confusing. The Origami Workstation is a case
for the Apple Wireless Keyboard. It unfolds to provide a stand for the iPad and as noted above, it works with a variety of covers (thin) covers for the iPad, including the SmartCover and a back cover.
It is NOT, however, a case that holds both the iPad AND a keyboard. You'll need a bag that holds both the iPad and the keyboard case if you use the Origami Workstation. A small messenger bag will work. So will bags (e.g. Travel Express) from Waterfield Designs.
There are several options for a combination keyboard/iPad case. Zagg makes a folio case that includes a keyboard (cited in a post above). And a previous design from Zagg (the Zaggmate) is sold by Logitech. Brookstone also has such a case, as does "Wekreat" (the TypeRider.) There are also a variety of knockoffs of these designs, some selling for as little as $50.
A couple of things to keep in mind about these cases. First, the keyboards are smaller than the Apple Wireless Keyboard. They have to be since the case is sized to fit the iPad, not the keyboard. If you're used to a full size keyboard, especially if you use a larger keyboard part of the time, you may find it difficult to adjust to such small keyboards.
Second, you generally get what you pay for in terms of keyboards. In my experience, cheap keyboards have inferior "feel" and don't stand up to extended use, especially if you're typing a lot.
Most folks think that you can't do better than the Apple Wireless Keyboard in terms of feel and durability. (I agree.) But if portability is your highest priority, one of the combination iPad/keyboard cases may be a better choice. Just keep in mind you'll be carrying around the keyboard 100% of the time.