I know this is an old thread, but just came across it in a search for letterpress, and wanted to pass along that http://www.briarpress.org [which is a letterpress community] has some great motifs for download, and many of them are free.
wow, congrats to all of you! that's really exciting.
In case anyone else wanders in here looking for halloween wedding ideas, I just stumbled accross this post on offbeatbride.com- a vaudeville wedding where people came in costume, based loosely on the late 1800's to early 1900's. fun stuff! http://offbeatbride.com/2009/07/vaudeville-wedding#more-2498