Canonical does make them, it sponsors them.  Ubuntu is ultimately community driven, Canonical just picks up corporate support contracts and manages financial/technical problems for large firms( amongst other things ).  You could, finances permitting, start your own Ubuntu support company with no less privilege than Canonical (good luck finding as good people).  Do not confuse the Canonical model with the Red Hat model, these two companies work very differently- I doubt you will find something comparable to RHEL.  Many Ubuntu people are not associated with Canonical at all.  I believe Dell just made a major deal with Canonical...

  "An easy-to-use distribution for novices should not be cluttered with too
many choices."

  I think Jeremy is on point here... the idea is to have an easy install where the stack is preconfigured.  Ubuntu is a really exciting idea because it has the potential to get groups using Linux who did not have access to it before.

  -jmz