Hold it, that first video there was done connecting the camera to computer and recording the screen images (check the youtube link). Wouldn't get too hasty now
^ Perhaps you'd like to get started on it yourself? Not sure if Dataghost has a 450D handy
I'm wondering if the 450D, or any of the new DSLRs (1000D, 5DMkII) could be running DryOS? That could be a bit of a problem...oh, and, the firmware would have to be decrypted from scratch.