Apple is locking iPhone users into their rigid software framework through the App Store: They would not let people develop interfaces to Gmail and now they prevent the great Opera Mini from being ported to the iPhone.
Adobe Flash has also been ported, but is kept away from the iPhone by Apple.
So if you've wanted to buy an iPhone, reconsider. It's buggy and Apple won't let you install any software that might "duplicate" available functions. They should be honest and say software that competes with theirs.
Source: Heise Article [german original]