Yeah, I'm still frustrated by some of these shows not getting decent resolutions, but Revolution did get a comic book that I think was posted online somewhere that I did resolve some of the plot threads. I never read it, but I do remember hearing about it.
Oh I can't believe I forgot one of my absolutely favorite one season wonders:
Charlie Jade
I eventually found a writers guide to the second season that never happened, and it sounded like it was going to go in some very interesting directions. I thought the character of Boxer 01 was especially fascinating. For anyone who never watched the show, the title character is PI from an alternate universe version of Cape Town called Cape City who is accidently sent to our Cape Town, and ends up getting pulled big corporate conspiracy to control a whole bunch of different universes. Boxer 01 was one of the main villains, but what was interesting was that in each of the different universe he went to, he had a totally different personality. In one he was hard partyer, in one he was spoiled rich kid, and then in another he was a peaceful family man.
I just found out it has a connection to one of the other shows we've been talking about, the series bible was written by Robert J. Sawyer, the author of the original Flash Forward novel.