So, what is the story on Ubuntu? It sounds like an operating system with a bone through its nose.
It does sound that way. It is one of the more mainstream distros of Linux. So it's kind of like trying to have Mac OS X's graphical interface on top of Unix, but without being nicely designed and useful like Apple's version, with crappy PC hardware and with little good commercial software. Instead of Photoshop you would be stuck with
The GIMP.