I tried this setup last year for about a week. It worked. I used my Canon DSLR (sureshot s5,I think) It's been modified with an intervalometer software to take a picture every 4 seconds, then I used a WIFI box a friend loaned me, they are used to link to computers in a professional photography studio, each shot taken is automatically saved on the computer. Once it was setup it was pretty easy to get WC to pull the picture off the folder that they image was being saved to. It just wasn't practical for me, I still needed low light for night recording and the DSLR took way to long to take a pic in low light. Also since my neighborhood is saturated with wifi now, it often would loose the wifi link and there would be no images for hours, it would reset itself automatically, but it just wasn't reliable.
It all depends on how much you have to spend and the extent you want to go to to make it all work.
Doc