Facebook is fast becoming a popular way to publicize an organization’s event, invite guests, and track who plans to attend. Facebook Events may be just what your group needs — but could you be shutting out some of the people who might support your event, by relying solely on Facebook to manage it? The fact is, for non-members of the site, ...

''Welcome to the age of the crowd,'' wrote Jeff Howe in The Rise of Crowdsourcing (2006). In coining the term crowdsourcing, Howe pointed to the rise of the open-source software movement; to the success of user-created Wikipedia; and to profitable businesses like MySpace and eBay ''that couldn't exist without the contribution of users.'' Howe put ...