i've got an apple bluetooth mouse. love it. but i just really need a multi-button / scroll wheel mouse. definately want to stick w/bluetooth. what's the skivy on microsoft's bluetooth mouse? specifically, does it work w/my powerbook's built in bluetooth or will i have to use a basestation or hardware add-on? further, should i just wait for macmice's upcoming bluetooth mouse? how is their wired version in terms of usability ?