I've found this user database of camera shutter count. There are several makers and models.
You can find interesting stats. In the 5D MkII, most of the shutters fail in the 6,428 to 14,263 shots margin. And 92% of the shutters are working even over 150.000 shots.
Although mine have only 10006 shots, when I have to do timelapses, I always rent a camera.
