Wonderfalls, thankfully it was put on DVD. Amazing, amazing show that exceeded my expectations when I watched it last year.
The Lone Gunmen, good while it lasted. Move to Fridays killed it as it did well enough on Sundays.
I wouldn't put Arrested Development on this list, 53 episodes is a decent amount. It would've been great if they had the back nine order for their third season. It did get a 2 hour finale though on a Friday against the Torino Games Opening Ceremony.
Help Me, Help You
Little known Ted Danson single camera comedy on ABC that lasted nine episodes in 2006. Had potential and was the first ABC show in years that I actually watched.