Hellblazer, the DC/Vertigo comic starring Alan Moore created occult investigator John Constantine, is being cancelled at issue #300 to make way for a new comic set in DC's New 52 universe. Hellblazer was DC's longest running continuously numbered comic and it's cancelation marks the last of the DC Comics characters with Vertigo titles being taken back into the mainstream DC universe (previously). Vertigo was originally an imprint for mature readers occult themed titles and creator owned work, though it has changed over the years with an adaptation of The Girl with the Dragon Tattoo becoming the first Vertigo to receive TV advertising.
Cold Reading - A rationalist ghost story by Alan Moore.
Breaking the Fourth Panel: Neonomicon and the Comic Book Frame (1, 2) Alan Moore’s recent Lovecraftian comic dissected. (MLYT, Possibly NSFW language and SAN loss)
Artist Stephen R. Bissette dissects the making of Saga of the Swamp Thing #20, the first American comics appearance of writer Alan Moore (um...previously), in a series of blog posts that feature much original artwork (by Bissette and others), as well as a sampling of Moore's apparently absolutely ginormous script for the issue. (Warning: Parts of Bissette's site are NSFW.) Part 1, Part 2, Part 3, Part 4, Part 5, Part 6.