I mean shops that develop professionally for the iPhone, or developers that want to port something else that they've done. If you put all this time into something only to have it banned, well, thats too big a risk when you need a return to keep yourself in business. Selling something on another platform, like Palm, BB, Android or Symbian is better than selling nothing on the iPhone. The "I am Rich" guy didn't lose a lot of time over his app, but some companies put months or years into development. You just can't do that unless you know your app will be accepted.

I understand your point about risk. My point is that most mobile developers will accept that risk in exchange for the marketing, distribution, and payment processing platform that the iPhone App Store provides. Until the other platforms you mention provide similar turnkey solutions, "looking elsewhere" is, to Apple, an idle threat.