I have the cheapest bluetooth mouse and keyboard going, so I'm not sure whats available in the high end. However I have notice that when navigating the SGS3 with a mouse I can not access any of the bottom buttons (menu, home, back). With the keyboard it is a bit easier since I can use the Esc key to control the back button. I'm not to worried about getting the home button, but I think it would be good to have access the menu button (bottom left). Sometimes I use a credit card stand and I'm a bit worried about knocking it over when I press the menu button.
Anyone know how to create a software version of the menu button? Or even better, does anyone know a keyboard or mouse trick to toggle it?