iOS 4 Will Support Exporting Video to Facebook
According to 9to5Mac, new pre-release of upcoming iOS 4 reveals new feature of exporting video to Facebook. As it can be seen from the screenshot of the code, the maximum height and width of the video will probably be 480 pixels, and the maximum frame rate will be 30 frames per second.
Previously Apple supported export to e-mail, Mobile Me, MMS and YouTube (second picture above).