There are many ways to tackle the Facebook style activity stream feature for your app. The simplest approach, which you can tack on at almost any moment, is what I'll describe here. You don't have to create a new model for news feed items or create any po...

I added the RSS Graffiti application to my Facebook account. It's a nifty app that lets you add any valid Rss/Atom feed to your profile (includes publishing to your wall) and to your pages.