I am rocking the Origami iPad workstation and I have to tell you - I absolutely love it. I use my iPad constantly at work for meetings and although I was able to get a lot of notes down via the virtual keyboard, it really isn't the same as typing on a physical keyboard.
I recently acquired an Apple Wireless keyboard, love the size as it can travel with me. The Origami Workstation is really a cover for the Apple keyboard which unfolds and via velcro allows you to create a stand for your iPad. I might add that this stand is quite sturdy. When I am done using the keyboard, I unfold the stand, close the cover and voila done, keyboard ready for transport.
I did have an all in one keyboard/ipad case but the keys on most of those are very small. I have medium size hands but still found it difficult to type of the keyboards and originally I thought it would be a pain to carry (1)iPad and (2)keyboard, but I am finding this solution to fit my needs quite nicely. Good Luck with your search.