I spent the last couple years renting shows like Arrested Development, Veronica Mars, Freaks and Geeks, Jericho, Wonderfalls, and The Critic, so I know how you feel. It blows when quality programs are canceled. Especially when you don't discover them until after the axe has fallen.
Murder In Small Town X was an amazing reality show I wish so hard could have ran longer than it did. Obviously there would be a new cast every season, but the format was intriguing. I'd have tuned in every year. Boston Public just sort of disappeared after a while, and Dead Like Me was excellent. Those shows, I was actually around for when they aired, but at least the latter two got a few seasons under their belt, unlike everything else mentioned.
Wah.
*E*