tried just now.
looks great

intuitive and smooth.
I am confused though, it tells me that I have 2 keyboards and 2 mouses detected even though I have one, and three when I have only 2 mice. A Phantom limb case?
With double mouses it actually feels like wielding dual guns.
pewpewpew...pew?
Of course it is very promising in general but it is also appetizing considering that it would be awesome to use both hands in a game, and maybe your feet to move. (put the keyboard down and press space with the toe )
Interfacewise of course mice are very lousy when it comes to using one with the off-hand. So an inertia cube (or even a wiimote) to render things even more intuitive (not only with respect to games but also dealing with OS) could be really fun.
I can imagine how nice it would be to create a game for pc where multiple players would just bring in their keyboards to play something that needs joint effort and coordination. (Phil here hopefully will agree with me if I say co-piloting a mecha, or co-commanding a huge army in Medieval:TotalWar would be kickass, maybe not as kickass as playing with multiple ponies and giving a colloquium about it).
I have one question though: You can probably register individual simultaneous clicks and hits so is there a reason why two mouses cannot click at the same time or was it just a design choice?
You know what, I want this software and a wiimote attached to each of my fingers, and I want a 3d OS, and none of that pseudo-futuristic tom cruise minority report microsoft table pc rip-off crap that only looks intelligent because of the accompanying classical music can top this bad mama.
But I am getting ahead of myself I suppose

(I think I am gonna crack open a mouse to see if I can tape the optic sensor on my finger.)
cheers.