Firefly as was already mentioned..
Good Guys - It was really funny, they stopped it halfway through the first season, then brought it back without advertising it, then canceled it 2 episodes before the first season was over.. sounds familliar no?
reaper - A victim of the writer's strike. The devil was worth 10 seasons by himself.
Farscape - Great story and the cast was exceptional. Sci Fi Just plain sucks.
Eureka - Again fuck sci fi
Enterprise - It was sooo much better than Voyager and having Bakula as a captain was great. Have I mentioned how much sci fi sucks?