Sandboxing and the Mac App Store
/But because TextExpander 4 can’t adhere to Apple’s recently-enforced sandboxing guidelines, the new version of the app isn’t available in the Mac App Store.
I think Apple will eventually back down on the sandboxing issue. Otherwise many great apps will have to leave the App Store which makes them less discoverable for average users. If users can't find great applications that hurts their user experience. Here's hoping good sense will prevail in this regard.
Via The Loop