I wrote this small Windows XP utility to read and display the actuation count stored in JPEG and RAW files produced by the 1-series cameras. As far as I know it's the only utility that offers this functionality that is completely free.
UPDATE: 18 April 2010
-= 1D-Count is now available to run online for Mac and PC users =-
It's still free of course and now you can use it from within your web browser. No more downloading and running a .exe file on your PC, though that option still exists for those that prefer it.
Your browser must be compatible with Microsoft Silverlight v3.0. Click here to see a compatibility grid. You need to see "3.0" in a green box to be OK.
Here's a direct URL: