Most Canon digital cameras have an IR remote feature that allows you to control the shutter with a Canon RC-1 or RC-5 wireless remote. These work exactly like a TV remote, and it turns out that the signaling for some VCRs and Satellite TV receivers are similar enough to the RC-1 that they will trigger the exposure on your camera.
This means that with a universal remote and the right device setting, you might be able to add wireless shutter control to your camera for a few bucks.
According to the discussion on the Camera Hacker forums over the last few years, folks have had some success with using a number of remotes and several camera models. Most have reported success using a code for MGA VCRs, though I couldn’t get this to work with a Digital Rebel XT. The Digital Rebels are reported to work with codes for Telefunken VCRs or Echostar satellite receivers (bummer that my RCA remote supports neither).
Have you been able to get this to work with your camera and universal remote? Please share your experience in the comments.