It looks like the
FEENIX Vitesse is in production actually.
![](http://i.imgur.com/yw4aY.png)
Can be verified here:
http://www.feenixcollection.com/vitesse.htmlI couldn't find any pictures of the actual mouse. But the other mouse they have, the Nascita, looks similar to the Logitech G9X.
Nascita:
G9X:![](http://www.logitech.com/assets/17697/17697.png)
I've used the G9X before, and it isn't a bad mouse, just to bulky for my preference. Instead I prefer the Logitech G500, which is by far the best mouse I have ever used, at least for gaming.
My friend owned a Nascita a while back, and although I never got a chance to try it, he said he liked the feel of it.
Those look really uncomfortable.
And yes, it does look like the grip would cause some awkward strain on the hand.