Poker mouses(eses)

[drewjax]

I have seen a couple of times on TV, most recently the new Daniel Negreanu PokerStars adds, of poker players using a kind of computer mouse I have never seen. It looks as if it basically is 'worn' or attatched directly to the fingers or hand.
I have been pretty happy with my wireless keyboard/mouse that I got at Walmart for like $25.

What are these things? Does anyone use them? Are they mostly used only for laptops? Mostly by poker players? Suggestions? Links?

TY