I don't know yet. My phone is still rebooting. Here's the post from BlackberryOS from someone who know:
"Facebook Mobile for BlackBerry Upgrade (Version 1.7)
October 16, 2009
Research in Motion has introduced a new version of its Facebook Mobile application.
Facebook Mobile for BlackBerry (version 1.7) keeps BlackBerry users connected to their Facebook friends while on the go. Facebook (version 1.7) is available for BlackBerry smartphones running device software 4.2 or later.
Note: Facebook (version 1.7) is not supported on BlackBerry smartphones with trackwheels.
Facebook Mobile for BlackBerry (version 1.7) provides the following feature enhancements:
* News Feed Support - The ability to set the News Feed as the landing page
* News Feed Filters - The ability to toggle between 'News Feed, Status Updates, Photos & Links'
* Caching Improvements - The application uses the device memory more efficiently.
* Feed Pre-fetching - The user will not be required to wait while their Facebook Feeds are updated
* View Profile Menu Option - Clients may easily view their own profile by selecting 'View my Profile' from the menu. "