This post was published 7 months ago. This info might have changed or might have become outdated.

Yes, this one is official. This is the legit real thing finally. There have been some leaks and one that was extracted from a ROM already, but this is strait from Microsoft. It was officially made available today.

• This Facebook application is the only version on the market today offering the ability to upload video right from the phone.
• People will also be able to access status updates, friend requests and photo tags, as well as read and create wall posts, share photos, send messages and update profile pictures.
• Facebook users will also be able to share many of their Facebook activities, including photos and status updates, across the full range of Windows Live services.
• Facebook will be available for new Windows Mobile 6.5 phones coming out later this year.

You can now grab the free download from the Windows Mobile Website or directly from your mobile Web browser.