The online version of an irrestistible force versus an immovable object? Lefty internet activism powerhouse MoveOn.org is now taking on Facebook, specifically over the social networking site’s new features that expose even more personal information to the wider web than before. For details about what’s now open to the public, check out the landing page for the email MoveOn sent out earlier. Be prepared for a shock — the word “privacy” no longer seems to apply on Facebook, since not only do Apps now have access to users’ info without their knowledge, but to a large extent so does just about anyone online. And there’s no way to hide much of your data, short of deleting it. Naturally, MoveOn has a petition on the page…let’s see how Facebook responds.