Ever since Facebook unveiled its new terms of service, users have been concerned over content ownership issues. For those still concerned, the Creative Commons licence Facebook application can help.
The new app lets you choose a licence for your photos, profile text, and status updates, as well as any video content you've uploaded. Each media, such as every photo you've posted, must fall under one licence, so right now it's an all-or-nothing choice. (The folks at Creative Commons hope this could change in the future.) The Creative Commons site has a description of all six main licences to help you understand what makes sense for your content. Once you answer a few basic questions—such as whether to grant commercial use of your work—the application will automatically select the appropriate one for you.
We're not entirely convinced that this app will help Facebook or others adhere to your rights as you define them, but perhaps seeing a licence alongside your content may cause them to think twice before appropriating your work.