i need a new mouse, I would like a bluetooth so it will work with my powerbook. i looked at the MX900 and besides the fact that its expensive, it doesn't say it works with macs....so my next question is, how did you get it to work with your powerbook. Second i can understand the charging part of the cardle thing, but it works as a bluetooth moduale so why do i need that if i have it built into my powerbook. Is there any other bluetooth mouse that will work for my powerbook. I don't feel like wasting $80 or higher for something that won't work with my computer because i just spent a pretty penny on my BTO powerbook w/ accessories. For the hell of it i might just get a corded mouse and tie the extra wire up.