The new version is 1.8 and brings quite a lot of changes. First of all you have a new user interface that, just as on the iPhone, allows you to navigate quickly to sections of the app. Search has been improved to return results for friends, subscribers, apps, and pages and there’s even a new photo viewing experience. Notifications are faster with real-time alerts and if you already have a timeline you will be able to access it from your mobile. Follow the source link below to download or update the applications.
Source: Android Market