They have camcorders now that take SD?
My brothers digital camera (primarily for stills) can record video (without sound), and it saves in MJPEG format .AVI files, from what I heard most digital camcorders use this format too. You can't play those files in Media Player, but there is other software available. I haven't gotten my Axim yet, but I think there's at least demo software on the CD that lets you play the files on the CD.
Edit:
http://www.bitbanksoftware.com/PQView.html can play those files, in case nothing on the disk can.