Are you serious? Well, the one and only Canonical's real achievement to date is maintaining a popular Linux distro for dummies. Since the distro is heavily based on Debian anyway, it's not a big deal.
But when you listen to them, it sounds like they practically did more for the Linux community than the kernel developers themselves. And when you tell them "hey, you guys put spyware in your DE, do you really think it's cool?" they answer with "lol, dude, we have root, be thankful we don't fuck you with rm -rf / or something". Wow, nice attitude. And whey they proudly announce their display server vaporware, the very first thing they do is bashing another display server that actually works and is already stable.
Amazing how shortsighted some people are...
Perhaps they don't contribute to community as much as others, but they bring something a lot more important then contributions, they bring USERS.
Every single non-Ubuntu based Linux distro is made by devs for devs (or sysadmins etc). Ubuntu is far from perfect but with it's user centric aproach it brings a lot of new penguins to our little community. And don't tell me that non-Ubuntu distros are easy to use for exWindows, average computer users which have no idea what things like partitions or terminal are. They take a lot of stuff from communitym but who doesn't? Google, M$, Apple... every takes something from Linux.
I hope that Compiz will die and MIR succeed, because I'm tired of all those fuckin problems with Compiz and X in last few years.
Btw, Ubuntu is Ubuntu, it doesn't even try to be Linux (yes I know it's based on Linux kernel and Debian packages).