Just as I was wondering when there would be such a thing, here’s the news: Jason Puckett, blogger over at Librarian X (tagline: with great power comes great bibliography) is writing Zotero: A guide for librarians, teachers and researchers. If you can’t wait until the ALA Annual conference (June 2011) when publication is slated, you can get a sneak peak at the chapter overview and the bibliography on the page linked in the last sentence.
There are some great Zotero resources on Jason’s Zotero page, well worth checking out.