an Ubuntu sources.list with more whistles and bells

I’ve been fiddling around with my sources list, trying to make everything perfect before I sit down to get to work. But I found out that a fellow named Ketil, from Oslo, has limited my procrastination by doing a better job with a consolidated list. His /etc/apt/sources.list is here: http://anotherugly.wordpress.com/my-ubuntu-9-10-karmic-koala-sources-list/