I posted this info in issue
But I'm not sure if comments made on resolved issues get seen, so I'm creating a new post.
This issue is a request for super slow shutter speed for movie mode on 550D.
Here's a very cool ghost effect for movies on a GH1 720p50 1/2 second shutter: http://vimeo.com/5588719
Here's a similar effect in a new Acura commercial: http://adland.tv/commercials/acura-tl-football-player-2011-30-usa
They both remind me of the earlier ghost work done in "What Dreams May Come" on the character played by Cuba Gooding, Jr.