Anyone fooled around with pen camcorders, usually marketed as "spy cams." I picked one up for $20 and though obviously limited in quality, found it has uses. An example follows. I see several uses for it in my own work: convenient for POV shots, a lot of which I have planned in a new project; setting up for a different angle during interviews or taping static things (it records for almost 4G worth!); using to shoot layered video where quality is less an issue; carrying with me for convenience and always having a camcorder handy. I have no idea why they are so cheap. I put everything on the web, so it suits many of my purposes fine and gives me new options.
http://cdeemer2007.blogspot.com/2009/12/christmas-at-our-house.html