I've said this to others, if you've got an idea for an application that you would like and have an interest in trying your hand at writing it, just jump in-- register as an iPhone Developer (it's free), download and install the SDK, take a look at the sample applications, and give it a go.
The worst that happens is that you find out that nothing makes sense, the best is that you've got a great idea that you can turn into a product for others to use. Either way, you've learned something.
The problem with the concept of "intuitiveness" is that it means something different to someone who's never tried to program vs someone who's been programming for 5 years, vs someone who's been programming for 20 years.
Since everyone is different anyway, just come on in! The water's fine!
rob.