Hey guys ... trackpad is great, but sometimes it's more convenient to use a mouse, nice for a change too.
If you're going to buy a mouse I suggest the "Anywhere mouse" by Logitech. It's usb with a tiny dongle, not blue tooth but it works perfect on any surface ... you can use it on your jeans, glass table etc.
I agree with the Anywhere MX mouse, its great and theres a driver for mac on there site.