I do not see how something like that would work for the eDGe. With the whole dual-screen orientation, attaching a keyboard case to it would be more than cumbersome and frustrating to use than beneficial. I'm currently using the "Mini Slim Chocolate Keyboard" I bought off of Amazon for $15 and it's PERFECT for the eDGE because it's just as small and can fit inside the M-Edge case along with the eDGe itself for a snug fit.

And best of all, it's completely optional!!! If I don't like it and don't want to use it, I simply leave it in the case and go about my day. BUT, if I want the option of using a physical keyboard that does not ruin the overall intention and design of the eDGe and is just as light-weight, then I've got a wonderful accessory that maximizes the overall usefulness of the eDGe.

Now if only the eDGe would allow for blue-tooth keyboards instead of only USB.....