Facebook is the most trending thing in the present scenario. People connect, chat, share enjoy with their friends just being on Facebook. The keep this experience when you are on the go, RIM developed Facebook for BlackBerry smart phones to make their users access the Facebook services at ease.
Facebook for BlackBerry provides all the services that the mobile application should have plus, recently they have updated their application by which users can have calendar integration which helps them remember events and birthdays for which generally we have to set a reminder.
According to me, this application is the best you can have on a BlackBerry smart phone. It works smoothly, without any lags or delay providing the high quality experience one can get. The app is available free to download from the BlackBerry App World and the latest version supports on OS 5 or later.