Because of the sheer numbers involved--and the lack of a compelling financial incentive for Apple--we don't see the company allowing unlimited promo codes any time soon. But Ken Case, CEO of , : letting users pay 30 percent of an app's price to move their previous license to the Mac App Store. In other words, what if Apple allowed developers to issue to existing customers that allowed those customers to purchase the Mac App Store version of an app for 30 percent of the app's Store price? The catch would be that the entirety of the 30-percent fee would go to Apple, preserving Apple's normal commission on each sale. Everybody wins: customers get to pay a reasonable fee to "upgrade" to the conveniences of the Mac App Store, Apple gets its 30 percent for each copy sold, and developers get to sleep better knowing they'll have happier customers and shorter customer-support queues.

The Mac App Store makes it dead-simple to install new software: You just click the Buy (or Free) button next to an application's icon in the store, and the software is instantly downloaded and installed. But what about an application? On iOS devices, the process is as simple as entering the jiggly-icon "edit Home screen" mode and tapping the little X icon on an app's icon. But on Mac OS X, uninstalling an App Store-installed app requires you to manually drag the application from the Applications folder to the Trash--an action that requires an admin username and password. And that procedure doesn't get rid of any support files the application may have installed in, say, the Preferences and Application Support folders inside /Library or ~/Library.

We'd like the Mac App Store to make the process of uninstalling an application, and all its support files, as easy as installing it was. It could be as simple as letting you click an Uninstall button next to a program's name in the Mac App Store's Purchases screen. If Apple intends for the Store to truly take the confusion and frustration out of managing your Mac's software, this is a must.