One million iPad apps in one day

Apple also revealed that more than a million applications were downloaded from the App Store for the iPad. Apple’s iBookstore saw over 250,000 books downloaded on the first day alone.

via AppleInsider | Apple sells more than 300,000 iPads on launch day.

Consider that with 300k devices sold, that amounts to 3 apps and nearly one book per device–in one day.  Or an attach rate of 4 content items per device (per day).