ive been using a mouse upside down since my first computer, it was a 386 33sx. all the mice coming out these days are all ergonomiclly correct. this sucks for an upside down mouse user. im using a microsoft intellimouse. not only did i buy it for the cool red stuff on the bottom at the time but i can also grab it by the **** end. after a year of use the buttons have developed a sweet spot thats hard to hit if its upside down. i was wondering if there is some type of prog that will invert the axis of the mouse so i can use maybe a track ball or some thing. right now they are impossible to use. on a weird not i mouse right side up with my left hand.