Hey, I thought that if some of you have some extra lenses on hand and a bit of time, or if you're just curious about things like this, here's a link to an article about building a device letting you can take macro shots without spooning out any serious cash. I know I got a kick out of how well it turned out!
http://www.photocritic.org/macro.html
http://www.photocritic.org/macro.html