I'd take the Sensei shape, make it a little more \__/ shaped, so you can lift it easier. Then I would make it slightly more comfortable by tilting just the right mousebutton a little like it's on the Ikari or Imperator for example but I would keep the base of the mouse straight, in order not to tilt the whole hand. I think the Sensei shape is more or less perfect otherwise. I'd probably make a smaller shaped mouse too for the people that have smaller hands or simply prefer the smaller sized mice (think Kinzu).
If the next Avago 9800 sensor has no inconsistent tracking or acceleration, I'd take that. Otherwise I'd give people the ability to choose. For the low sensers out there I'd make a model with the 3090 and specifically for the high sensers that are using hard mouse pads I'd make a model with the Philips Twin-Eye, as there is no real alternative right now and the 3090 is a little too jittery at higher DPI counts. A second sensor to detect lift off would be a good idea in that case, although adding something like a single-eye model of the twin-eye with the same resolution would be the most perfect, as you could detect the z-axis separately and remove the z-axis motion from the output of the twin-eye sensor. This would not only eliminate the z-axis problems altogether but also giving you real control off the lift-off distance. Or maybe Philips releases a Triple-Eye sensor finally that does this in a single package.
Rubber finish and maybe even putting some real rubber on the sides, although this would depend on whether it lasts long enough and doesn't affect weight all too much.
Omron Japan... all in on this!
Either Alps encoder or something optical, depending on which works best in tests.
non-braided but of very flexible and robust rubber.
2 and only on the left side and on the larger model. (A completely ambidextrous model would be another option)Edited by MONVMENTVM - 1/23/12 at 1:56pm