I just want to publicly thank Mark Shuttleworth, to counterbalance the whining from the crowd that feel Canonical somehow owes them to fund the development of some particular bit of software that happens to be shipped as part of Ubuntu.
So, thank you, Mark, for sharing your personal wealth with me by spending it to provide a polished and working Linux distribution, which has provided me with a better experience than previous use of e.g. Red Hat, Fedora, Gentoo, and Debian. I could probably get by with another distribution, but for me, Ubuntu combines a flexible and reliable system with a user interface I can give to less technically oriented family members.
(Also thank you people who develop the kernel, X, Gnome, Firefox, Emacs, GCC, Apache, PostgreSQL, Gimp, Inkscape, etc, etc - and the employers who pay for your work. I am particularly grateful that you are providing your work under a license that explicitly lets a third party redistribute it as an integrated, polished product, thus helping to make Ubuntu into the great product it is.)