[...] if I'm using the mouse for long periods of time ( read: gaming ).

I personally believe I'll leave that kinda problems to some monk who's far more expert than me! I'm at most playing some arcade every now and again. (Read: some incarnation of Tetris, 99% of the time. Although to be completely fair I'm having some frenzy these days for a tiny little game called Erix which used to come preinstalled in some Sony Ericsson mobile phones and of which I found an "improved" Java version: it can be considered as loosely based on the concept of the classic Snake game.)

That would be my only concern for blazar's situation.

Well, not only: as I explained in my last post on this subject, even a "better" tracking mechanism, for some acceptation of "better," would be by far suboptimal. Best of all would be to hold the "device" i.e. namely the Eee with both my hands, and interact with it "only" through the keyboard. Even with a trackball by the side of my bed, it would be annoying to have to reach it with a hand, and which one, given that I continuously change position? Well, sort of...