Having visited some of the craft shows in town recently and poking around Etsy, I noticed many people are creating glass marble magnets. I was thinking I could take my own images and create some of them too along with push pin versions.
Here are a few of the better how-to posts I've found related to creating marble magnets:
http://junkyloveinfreehand.blogspot.com/2007/10/glass-marble-magnets.html (some great examples of completed work)
I'm thinking since my primary format for displaying my images is mostly squares, then I might try some square glass tiles instead of the round glass marbles. Time for a trip to a local craft store. See http://www.etsy.com/view_listing.php?listing_id=8584677 where one Etsy artist has done what I have in mind.