Get PCLinuxOS, it's tons better:
It's much easier to use than Ubuntu, it supports loads of hardware, has a whole load of software (I really mean a load as well) you can install using it's Synaptic package manager (automatic download and installation of software without using the command line), Kernel upgrades and be done just by clicking a couple buttons (installs via Synaptic again) it's really good, I love it! It's so clean and detailed looking, fast loading and perfect for someone looking to come from Windows (or Unbuntu

) and is very stable. Has a good community of people that will help you out but I think their IRC channel is way better, always got PCLinuxOS pros on there willing to lend a hand.
Take a look at this
http://www.lockergnome.com/nexus/it/2007/04/26/pclinuxos-and-ubuntu-examined/
http://www.pclinuxos.com/
p.s. You might as well download it and give it a try because it is actually a live CD and you have the choice of installing when you get in to the Desktop.
EDIT: And as said in the Locker Gnome article, Ubuntu is more for an Intermediate-beginner (I'm a total n00b). I think PCLinuxOS is the perfect stepping stone in to the world of Linux, I think the next step after that is Ubuntu, but that's my opinions.