Multi-touch on the top of the mouse is an interesting concept. I tried dragging my finger over my MM, and liked the idea. However.... I noticed that I was also moving my mouse at the same time, slightly. The mouse would need to ignore it's own movement while being used as a mult-touch device.
The mag-safe charger is also good. Not for safety, its just easy to use. I might take it a step further and make the other end (the part that connects to the power source) a standard USB plug. So basically a mag-safe USB cable. When its plugged in the mouse could actually talk to the computer via USB, and get its power as well. When unplugged its then BT. The reason for the USB mag-safe connection is that it then opens up all the Macs for use with the new mouse. And it keeps cord clutter to a minimum as most people use their mouse closer to the keyboard than the monitor or a power plug.
The introduction of a multi-touch keyboard is so overdue..... its not funny. Your concept ones look exactly like the ones Apple should be putting out (that is a compliment! Better that than looking like something Dell puts out, eh?!).
A wired backlit keyboard is also something Apple should introduce. There are actually a few people who need it for practical reasons. The rest of us would buy just because its cool! Apple could charge a premium for it. 🙂