The iPad was released on April 3rd in the United States. That was 257 days ago. The iPad App Store, launched on the same day, now has over 50,000 apps. It's got 51,295 apps to be exact, at the moment of writing this. It only took 8 months for Apple to reach this milestone, but it's been kind of an unstoppable growth.
In the past months, in fact, we have seen how the iPad App Store was growing to accommodate more apps every month. 10,000 apps in June. 20,000 apps in August. Then, more than 40,000 apps only 24 days ago, when iOS 4.2 was released to the public. We can argue that the App Store (for iPad and iPhone) is increasingly becoming a place for games, rather than standard "apps", but still -- these are the numbers. And even if using and getting a device to fit in our daily lives has really nothing to do with numbers, this is an achievement Apple is going to rely on for months to come.
50,000 apps available for the iPad isn't cool. You know what's cool? Thinking about the Mac apps ready to go on sale in another App Store.