Our friends over at Apptism, a site that tracks and rates App Store apps, have pointed out that their counter recently flipped over the big two-zero... zero zero zero. That's right, only three months after hitting the 10,000 mark (and that took only six months), the amount of apps in the store has doubled, and there's no sign the acceleration will be stopping any time soon.
The ease of development in the iPhone SDK, combined with the huge success of the device and Apple's own promotion revolving around how many apps are in the store, mean that the platform is taking off like a rocket. Sure, numbers aren't necessarily the best indicator of quality (anyone want to speculate how many of the 20,000 apps have to do with farting or belching?), but the fact is that people are both developing and consuming apps from the App Store in gigantic numbers. How long before we reach 50,000 different applications on the iPhone? A million?