A couple of weeks ago, I was playing with creating red-blue anaglyphs using the GIMP and images from the Library of Congress collection of stereograms which you can download. Today, I spent a couple of minutes to do a simple screencast that shows how to do it (WMV, I’m trying to figure how to rip it into other formats). If you find it useful or have any suggestions, drop a comment here or send me an email.