1. Does it require drivers to use a non-standard layout? If I want to customize it, do I need drivers on the computer I use the keyboard on, or just a program on the computer I do the customizations on?
2. Can I map any key to any button? For example, can I move the Mod key to the caps lock position, and place Enter where Mod is? I think you can; the page says "How about swapping Space and Mod? Or any other crazy remapping ideas? We've got you covered!"
3. Why is the keyboard still laid out in the "traditional" way, with non-vertical rows? Q should be directly above A, not offset.
4. I want to be able to have more than four layers.
5. How does layer switching work? Does pressing Fn go to the Fn layer, or are layers (to use Jef Raskin's term) quasimodes, where releasing the Fn button goes back to the Base layer?
6. If I switch to the Fn layer, how do I get back to the Base layer?
7. What if I want to press two buttons on the Fn layer in a row?
8. Can I use it on Linux? Can I customize it there? Can I use the media keys, and can I use application-specific keymaps?
9. I hope you can save layouts, and quickly switch between them. Ideally they're sharable.