iTunes Music Store Estimator for Mac OS X 10.2 and higher is a little application that shows the estimated current total of tracks sold on the iTunes Music Store (iTMS) as well as an estimate of the time of the next milestone sale (every 100,000th track). This is important because Apple is giving away iPods and iTMS gift cards to the purchasers of the milestone tracks until total sales reach 500,000,000.
The application will automatically update its estimate every 5 minutes and, when there are 10 seconds or less until the next estimated milestone sale, the application will beep each second. This application was inspired by the counter on the iTunes web page and uses the same source data as the Apple counter.
The estimate can also be updated manually at any time by hitting Command-U.
More info and download link here.
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Nine Figures 2 tracks Apple’s iTunes Music Store song sales in Mac OS X menu bar – July 06, 2005
Apple launches iTunes Music Store Countdown to half a billion songs; win 10 iPods, 10,000 songs – July 05, 2005