iPhone and iPod touch users have downloaded more than 10 million applications from the App Store since its launch late last week, Apple has announced. The store, which launched with over 500 applications, now offers more than 800 apps, with more than 200 offered for free and more than 90 percent priced at less than $10. “The App Store is a grand slam, with a staggering 10 million applications downloaded in just three days,” said Steve…