Quote - "By the by, the iPhone is actually quite open - their only restrictions are that you do not compete directly with their core processes (e.g. don't put Skype of Google Voice on there), or try to violate security. Otherwise, the rest has to do with quality." 

 Sooo, porn, farts and baby shaking are a core process or a security threat? Perhaps they will say they were too low quality.  I think DoJ is still trying to figure out the Google Voice thing.

pr0n app for your iPhone (link semi-safe for work)

The fart ones are still in there IIRC, and the baby-shaking app was pulled due to general public outrage (whihc is understandable).

By the by, I don't own an iPhone - I use the Crackberry Curve I got issued at work, and given that personal calls never exceed 30% of the volume I get on the thing, it suits me (esp. since it costs me $0.00 per month) . A 2GB microSD chip packed with music completes the deal.