iPhone App Store 20,000 iPhone apps in just seven months

Apple released the iTunes App Store on July 11, 2008. Now, 7 months later TUAW reports they’ve hit 20,000 apps. For those tracking the darn-near-exponential growth at home, it took 5 month to hit 10,000, so they’ve doubled again in less than half the time. With Windows Mobile still in stasis, Android only sound and fury thus far, the Pre still pre-mature, and BlackBerry blocked by its small on-board memory, Who will be able to take some of the iPhones thunder?