Why isn't Diamond's Previews catalog available online for free? Seriously, they could just create a PDF file from the InDesign (or whatever program they use) file and let people download it. Sure it would be a large PDF, but so what? Then more comics and graphic novels would get exposed to those who don't get the paper version, and people who never set foot in a comic store may find something they like. Most comic stores I know of either provide Previews for free to their regular customers, or sell them at cost; so they could save on shipping charges by not having to get multiple boxes of the print version. Seems like a win-win-win situation to me.
(Of course, the information from Previews is already out there each month from the various online comic shops; but a PDF version provided by Diamond would I think be more user-friendly.)