Suggestions
I've already received some interesting suggestions of topics to cover here, including the new transition to full UPC code in the U.S.--13 digits instead of 12--and how a Wiki-biblio-o-pedia might be expanded to include other media, like DVDs and music.
I have to say that I'm pretty excited about the notion of building a Wiki sort of informational site. The Wikipedia itself is a shining example of how to manage such a project, and because facts about books aren't copyrighted, there's very little risk of having people contribute tainted data. In fact, depending on how well the project is structured, some online bookstores might provide a core of data to start with in the project in order to get the benefit of collaborative error fixing.
I know as an author it frustrates me that there's no good way for me to say to the world of bookselling, here's the definitive, authoritative, author-a-tative version of my book's details.