Are you a list addict? If so, then Listgorilla is for you! Currently in beta, Listgorilla is a fantastic site, with a great looking interface, that lets you view, create and modify lists created by you and other users. Personally, I think the best feature of the lists created on this site is the good/bad flags listed next to each item in a list, allowing users to "vote" for the placement of specific items in a list. Don't think that Spider Man is the greatest comic book hero? Vote that choice down from first place in the list.
It is possible to log in to Listgorilla using your Google account, your Facebook account and even your Twitter account, but that's only required to create lists or to flag items as good or bad. Browsing the lists is open to everyone.
Head on over to Listgorilla and take a look at the lists they've put up! While you are there, why not create your own or have your say about someone else's list? Enjoy!