Apple has posted a web page counting down - or actually counting up - to the one billionth app downloaded milestone on the App Store.

That's a significant goal for a couple of reasons. First, you have to be amazed that people have downloaded one billion applications for the iPhone and iPod touch since last summer. Second, you can win some cool stuff if you download an app between now and the time that Apple reaches the one billion mark.

In addition to the one billionth app download, Apple has posted the top 20 apps of all time on the App Store.