It looks well-implemented... Design is slick. In the "build something people want" vein -- why does anyone want this? If you can answer that question, you should add benefit statements to your home page... Or example use cases.

My gut response is that your most common use case is that a person wants to build a "best of" list that other people can contribute to... The end benefit being that you might discover stuff that you weren't aware of, right?

If I'm passionate enough about a subject area that I want to make a best-of list, is discovery a huge motivation? And if it was, wouldn't I head to a destination site centered around that subject area for that discovery? Or just google for "best sci fi books of 2007" or somesuch? It seems that you'd have a better chance finding great unseen movies on IMDB instead of creating a list on Seekler (given that movie buffs are likely to hang out on movie-centric sites).

This seems like a classic example of trying to appeal to all audiences. I'd suggest creating a 3rd level domain for the most list-centric audience you can find. If it's comics, create "comics.seekler.com" and see if you can make it fly.