From files gleaned from the latest Developer Release of the iOS 4 SDK they have found configuration files that seem to show that Facebook Video Export will indeed be available alongside the current options to email, MMS, post to MobileMe or send videos to YouTube.
The maximum size of video files that we will be able to send to Facebook, according to this data, seems to be 480 x 480, at a maximum frame rate of 30 Frames Per Second.
Are you excited to be able to post videos to Facebook from your iPhone in future? Or is this a “Meh” feature for you? Let us know in the comments.