Attempting to use the app gives users an error code: NP-13144-3. According to PlayStation's Sid Shuman, the error occurred because "there was a change to FB and it's causing some issues with the app." The issue being that it doesn't work. The app is no longer downloadable off the PlayStation Store while Sony works on a fix. While it may be embarrassing for Sony to have launched a totally non-functioning app on the day of the Vita's launch, Sony does promise that it "should be resolved soon." In the meantime, maybe you'll want to use Twitter instead? Or just use the system's built-in internet browser.
Users were greeted with this error message