I am waiting for my Macbook in the mail. I wanted to get a mouse (leaning towards the Mighty Mouse, although lots hate it- it seems.) Anyway, I could very easily get a much cheaper wireless mouse that isn't bluetooth. Is Bluetooth's only advantage that I don't have to plug a wireless dongle in the USB port, as I would with the other mouse? Any recommendations on a mouse? I want something that lets me scroll side to side (like a tiltscroll wheel), and I need extra buttons to activate expose and dashboard... and it needs to work with Mac well! Any advice on keyboards? Ideally I could get both for less than $50 but I doubt that is going to happen. Thanks.