I currently have two screens: the primary 1440x900 LCD screen of my MacBookPro and I am projecting in 800x600 for the CSS Working Group meeting. Because the projector's resolution is lower than my screens, if I put the mouse pointer at the bottom-left of my LCD screen and move it leftwards, I hit a wall unless the vertical position is lower than 600... That's really bad and I wish the mouse pointer would move to the bottom-right corner of the projection if the y position at the bottom-left corner of my LCD is >= 600..