Logitech's Unifying Receiver can be a bit of a hassle to use on Linux, but 'Solaar' makes it easy.
Ubuntu 13.04 sees a refined set of Mouse & Touchpad settings added, along with a interactive 'testing' area for double-checking your buttons, double-click speed and scroll wheel.
Canonical sell an Ubuntu-branded optical mouse in their online store - and i've can't decide whether or not to get one. My need? I can't stand the trackpad on my netbook. At all. It's small, overly responsive in places and not enough in others.
OS X Lion introduced natural/reverse scrolling where by "content tracks finger movement". If you've ever used a touchscreen smartphone you'll already be familiar with how this works: you drag down to scroll up; you drag up to scroll down. 'Natural Scrolling' by Charalampos brings reverse scrolling to Ubuntu.