Here's one for all of you do-it-yourself types. Ever wish you could attach any ordinary 35mm lens to your camcorder? It'd make it much easier to play with depth of field while filming, without having to spend thousands on a capable video camera or attachments.
Daniel Schweinert of JetSetModels builds adapters that bridge the gap between lens and camcorder, but he also puts all of his DIY know-how on his site as free, downloadable PDFs. If you've got a few hundred dollars to spare, some extra hours to invest and love to put things together, check them out.