Inquiring minds want to know, right? On most Canon DSLRs, once you get over 100,000 shutter actuations, the risk of it failing increases (pro bodies more like 300,000). So how do you find out?
I just read a good article full of information on this topic titled, Finding the number of shutter actuations for your Canon EOS DSLR. The author, Shane, provides good background information on the subject, then lists links to freeware utilities that can help you determine the shutter actuations for your camera.
It's not something that I lose sleep over at night. But it is cool that I can find out if I want to.
You can find more photo tips and "photography how tos" on my Pinterest page.