The Apple App Store has hit 25 billion downloads. Apple.com is currently displaying the following message:
The 25 Billion Apps Countdown Promotion allowed one winner to receive a $10,000 gift card for the App Store.
In its rules for the promotion, Apple said:
The Promotion shall begin on or about February 13, 2012 and ends with the downloading of the 25 billionth app (“Promotion Period”). For purposes of the Promotion, the downloading of the 25 billionth app is considered to be either the downloading of the 25 billionth app from the App Store or the receipt of the non-purchase entry after the download of the 24,999,999,999th app, whichever comes first. Only entries submitted in this time period will be accepted. Sponsor’s computer is the official time keeping device for this promotion.
So, as the message on Apple.com says, the promotion is over. This means Apple hit the 25 billion mark (in case the "a billion times over" message wasn't clear enough).