In it, Sinclair described how, immediately after the Democratic Convention, the Los Angeles Times began running on its front page a box with an Upton Sinclair quotation in it, a practice that the paper continued, every day, for six weeks, until the opening of the polls.
And indeed with a list of status updates running down the page, a box at the top inviting you to "share what's new" and a box of profile photos to the side, it won't be difficult for new users to get the hang of the whole idea.