Earlier this week an official website for the late comics master Will Eisner launched.
While the site is dedicated to showcasing all of the fantastic work that Eisner produced through out his career, his work with The Spirit stands out and dominates most of the site. Not that I am complaining. I think Denny Colt is a wonderful character and not only enjoyed how he was handled by his creator, but also how Darwyn Cooke has stepped in to chronicle new adventures of the Spirit over at DC Comics.
The information on the site is fairly extensive. It lists out all of the different books and collections that Eisner's work has appeared in. There are galleries of Eisner's work, and sections dedicated specifically to two of his character creations: The Spirit and John Law. They have a forum and the beginnings of a wiki called "Eisnerpedia." The wiki is currently very sparse, but I am sure it will grow in time.
It's a nice site. You should check it out.