The Continuity Pages is a cool little site covering comic books. They've just started a "news" column called The Comics Blotter which may be of interest to you but their bread and butter, so to speak, is hosting pages devoted to comic book continuity.

The Continuity Pages is a descriptive, hyperlinked catalog of comics and related books, organized alphabetically by primary author (or corporation) and then in a logical order. This order is not necessarily alphabetical by title, numerical order by issue, or order of publication. Such an organizational stragegy does much to make sense of American comic book publishing, in which the continuing narratives of some characters or families of the same run through multiple titles. Every comic or book appears in the Continuity Pages only once. Whenever possible, hyperlinks are used when refering to a volume on another page or to an creator with his own page.