From six colors:

First there’s the maddening inconsistency: This is an app that was accepted into the App Store, and is even being featured in the App Store as I write this. And now, a few weeks in, someone at Apple has decided that the app is too… what? Too useful?

And the icing on the cake:

I just don’t understand this behavior from Apple, though maybe I’m just overly sensitive to it as a programmer myself. Don’t they realize a large reason for the success of the iPhone is the fantastic third-party developers who make their platform what it is? Either allow things or reject them, but don’t open your doors, welcome someone in, then slam those doors behind them and set the room on fire.

Update: Apple has clarified their position on Calculator Widgets, and it looks like PCalc can stay!