If you have a Flickr account, just post an UNEDITED photo, straight from your Nikon camera (don't know if it works with Canon, etc) to Flickr and enable exif data. The shutter actuations will show as "total number of shutter releases for camera." This does not work with photos that have been edited via Adobe products.
Reminds me of the lyrics from Over The Rhine's "Trouble"
"Novices have expectations ‘Cause they think they should Experts have their revelations Like they knew they would What may seem complicated Is overstated, downright misunderstood."