Facebook Messenger recently released for BlackBerry last week. There is now another update by way of version 1.0.99 to download. The update looks to allow you to close alerts for specific conversations. Have any of you downloaded Facebook Messenger? Or, are you only using the chat capabilities within the Facebook 2.0 app?
Facebook Messenger v1.0.99 update should get pushed to your device. If not, you can download it here.