As a sufferer of carpal tunnel syndrome, I can tell you that this palm rest design is a bad idea. You're focusing the weight of each hand on a pressure point which is sure to contribute to pinching the median nerve.
Also, separating the left and right hand boards from one another really helps with joint stress. I saw one of the designs has a axle. Why not just split the keyboard in two completely? I vote for each half of the keyboard having a velcro strap that I can comfortably attach just above each of my knees. For most people, this would be a very neutral posture. In fact, it may even inspire better posture as folks would reach for the keys on their knees.. You know.. You could call it KneeKeyboard or Keys-4-Knees. Then again, I'm sure someone has already done it, but I'm too lazy/busy to look into it right now.
Other than those comments. Awesome stuff.
Edit: I'd like to add that the wrist pad suggests to me wrist movement is required to reach all of the keys. Again, the carpal tunnel gnome tells me that pivoting my wrist is painful. Why not strive for very little wrist movement. Once you get there, the surface is it's own support, and it would support more than just the wrist; it would support the forearm, too (see knee keyboard suggestion above).
I also noticed one of the designs recessed the keys below the face of the keyboard. I think that's a good way to get away from the vertical wrist pivoting. Still, you'd need to mind the lip of the recess, so it's not a high impact point on the wrist.
Also, separating the left and right hand boards from one another really helps with joint stress. I saw one of the designs has a axle. Why not just split the keyboard in two completely? I vote for each half of the keyboard having a velcro strap that I can comfortably attach just above each of my knees. For most people, this would be a very neutral posture. In fact, it may even inspire better posture as folks would reach for the keys on their knees.. You know.. You could call it KneeKeyboard or Keys-4-Knees. Then again, I'm sure someone has already done it, but I'm too lazy/busy to look into it right now.
Other than those comments. Awesome stuff.
Edit: I'd like to add that the wrist pad suggests to me wrist movement is required to reach all of the keys. Again, the carpal tunnel gnome tells me that pivoting my wrist is painful. Why not strive for very little wrist movement. Once you get there, the surface is it's own support, and it would support more than just the wrist; it would support the forearm, too (see knee keyboard suggestion above).
I also noticed one of the designs recessed the keys below the face of the keyboard. I think that's a good way to get away from the vertical wrist pivoting. Still, you'd need to mind the lip of the recess, so it's not a high impact point on the wrist.