Ubuntu is currently the most popular Linux distribution in the consumer market. Simplified user controls, interface, and overall ease of use can be attributed to its success. Unfortunately, it doesn't always have all the software you might need to go through your day. You can use Wubi to install Ubuntu without having to create a separate partition, though this also means needing to reboot your machine to access Ubuntu programs.
Another alternative method of installing Ubuntu is through a virtual machine. In this video, Matt Ryan (The Frugal Geek) takes us through the process of installing Ubuntu on OS X using Parallels. Other alternatives include VirtualBox, VMWare Fusion, and Virtual PC, among others.
You can find coupons for Parallels here:http://go.tagjag.com/parallels
Matt Ryan can be found on Twitter here:http://twitter.com/FrugalGeekhttp://chris.pirillo.comhttp://lockergnome.comhttp://twitter.com/ChrisPirillo