Great article by Applematters on just why people should just stop whining about having apps like Mail and iTunes alternatives rejected from the iPhone App Store. If you want to complain so much, let me offer you some alternative platforms, the darkside platform called Windows Mobile, the only-just-recently-caught-on-despite-so-many-years-of-development Symbian platform, and the we-want-to-be-apple-and-we-hate-microsoft Google Android platform.
You can find the article here.