Canon 300D - 10,000 = 0.066 CENTS A SHOT Based on price $670.00US
Canon 350D - 50,000 = 0.015 CENTS A SHOT Based on price $789.00US
Canon 20D - 100,000 = 0.013 CENTS A SHOT Based on price $1300.00US
Lifted these off somewhere, but I guess its a conservative number. There are plenty of people with well over 50K shots on their 300Ds and still no shutter problems.