My local Best Buy has the Logitech - MX Revolution Wireless Laser Mouse on sale for $39.99 instead of $99.99, but I'm hesitant to buy it because it's USB instead of Bluetooth. How well does this work with a late 2008 aluminum 15" MBP? Does the USB connector take up a lot of space as to not allow another device to be plugged in to the USB port next to it? Will it work if connected to the USB port of an Apple external keyboard?