stevenf.com - A couple people have asked me to post an update...

Steven Frank makes a lot of sense, explaining why there seem to be two app stores for the iPhone:

The iPhone/iPod Touch, being available for both Mac and Windows, has a single source of software in the app store. That Mac AND Windows thing is key. The app store is not just a software market for Mac users. This is why it blows the minds of indie Mac developers like myself. Itâs because it follows the rules of the general software market, not just the Mac software microcosm that we Mac indies enjoy.

Found via Daring Fireball, of course.