I looked at Rollyo, LibraryThing, and Lifehacker.
In Rollyo, I used libraries as a search term within the reference search. The second listing was Public Libraries. Public Libraries took me to yellow pages.com which was good for maps and directions of public libraries in the Chicago area but not good for a description of the library. The first listing in custom web results took me to Library Information Services – refdesk.com which allows you to browse libraries collections worldwide. Links in refdesk.com included: American Library Association, Internet Public Library, Library of Congress, and other excellent sites.
I joined LibraryThing. LibraryThing allows you to create a catalog of your books and also connects people based on books they share. The Book Page includes who has books, tags, reviews, and conversations. Your Profile allows you to tell all about yourself and your library or keep the profile completely private. You can Create and Join Groups. You can talk in the group forum. With Talk, the forum system, you can see conversations in groups. Local is a gateway to local bookstores, libraries, book festivals, and to author readings, signings, discussions, and other events they host. You can keep track of events in your area. I used Local and did find bookstores, libraries, and friends of libraries (which contained link to library’s website). I liked my own Local search which found an upcoming event at Borders.
In Lifehacker, I liked the “Choose the right image format for screenshots” article which shows a comparison of JPG, PNG, or GIF formats.