Over at TAZ-forum, the user J_K9 have written a massive guide to making Ubuntu a bit more fun to use.
Read the forum thread here
However, with a default Ubuntu install you can't listen to MP3s, you can't watch your new DVD copy of Chicken Little, and you can't even test out those spankingly marvellous graphics effects offered by XGL! Sometimes your graphics card will not be supported (especially ATi ones), and so you won't be running Ubuntu with your screen's native resolution. Well, all of this can soon be fixed. Let me show you how.
Thanks to the allways awake guys at TuxMachines for digging out this link.