further to above & after a few emails hunting em down-
cannot currently get Gamecube version in this country atm (and america won't ship to here) but
THESE PEOPLE are their official suppliers.
from a few reviews supposedly PC and PS2 ones are relatively sh!te - but Gamecube one is the Mutt's Nuts.
Will be available over here later in the year - so looks like lil sis will have to have it as xmas not burfday pressie
I'm still tempted to get myself a mouse-one; though don't really think you'd get the same benefit from a mouse as gamecontroller