Two weeks ago, I created a new Facebook page for Wikisource, http://www.facebook.com/Wikisource
You can watch that page, even if you don't have an account on Facebook.
There were already some other pages and groups, but none that was updated or where I could post updates. The new page is different. Whenever I recognize a Wikisourcerer among the new fans, I make them a co-administrator of the page. The page now has 54 fans, of which 19 are administrators. An administrator can add new admins, post official updates in the name of the page, i.e. Wikisource, and see statistics for the page and its audience. This "wiki" approach to Facebook page administration is a bit risky. Any one of the admins can remove all the rest, hijack the page or close it down. I'm simply assuming good faith.
Of course, not everybody uses Facebook. But then again, not everybody uses Wikisource. This page is one channel to reach out with information about Wikisource (or book digitization in general) to people who use Facebook. People who have nothing more important to do than to watch Facebook, can learn that a more meaningful hobby awaits them in Wikisource.We can still need other channels for outreach, all used in parallel.
What's needed now is more updates (messages, links, pictures, funny quotes, timeline milestones) from more of you, telling the world (on Facebook) what you are doing in Wikisource. Should all updates be in English? I don't think so. Let's try to mix languages! Translations can be provided as comments to the updates.
If you "like" the page (become a fan), it would also be helpful if you would "invite friends" to do the same. It needs to grow a larger audience.
Facebook has introduced a new "timeline" format, which has allowed me (or any page admin) to add some historic milestones that Wikisource has gone through, from its start in 2003. This summer, we have the 5th anniversary of the Proofread Page extension coming up. Perhaps a cause for celebration during Wikimania?
Background: I'm user:LA2, a wikipedian since 2001. I was a member of the board of the Swedish chapter 2007-2012, but recently left this position. I'm also the founder of Project Runeberg, the Scandinavian e-text project, whose Facebook page has 1500 fans.