News flash: gamers play a LOT of Modern Warfare 2. Infinity Ward tweeted that Modern Warfare 2 players have invested more than 1.75 billion hours (200,000+ yrs) of gameplay on Xbox Live alone since release. Kotaku has a pretty good look at what 200,000 years is like.
Then there are those guys who love Modern Warfare 2, but do a lot more than just play it online. A group of filmmaking fans have created a Modern Warfare 2 short film that supposedly cost $209.42. Of course, these film guys aren't accounting for the talent and equipment, as they probably had all of that on hand from their day jobs at Corridor Digital.