Definitely agree with a lot of the shows on here, especially Sports Night, Andy Richter Controls the Universe, Freaks and Geeks, and Twin Peaks. Technically 24 was cancelled, so I'll definitely throw that one in too.
I'll add a couple to the list:
1) Undeclared
2) Veronica Mars (never would have thought this until I caught it on Netflix)
Lets hope that Fringe and Community both escape similar faiths (they both barely got picked up for next season).