Facebook CEO Mark Zuckerberg this morning announced that the Android Facebook app is getting a refresh. Places and Groups are coming in the update -- they've currently only been available on the iPhone. Facebook's location API is opening up, and they're making it so businesses can offer deals to Facebook users nearby. Sound a little familiar? (Foursquare says hi.)

There's also single sign-on now, meaning, you'll sign in once and any other app that uses the Facebook APIs will already know you're logged in. Facebook's Erick Tseng (the former Android lead) used this example: You're logged into Facebook, and say you want to log into Groupon. All you have to do is tap the "Sign on with Facebook" button, and you're good to go.

Zuckerberg reiterated that Facebook is not planning on developing its own phone. Repeat: No Android-based Facebok phone.

There are 200 million people using Facebook on mobile products, Zuckerberg said, so "This give us kind of a good base for developers to build social apps on top of."

Facebook's iPhone app got a bit of a refresh, with improved tagging.