De website Mac Developer Tips started with a tutorial on how to develop applications for the iPhone. The course is split up in 4 categories (Objective-C, Cocoa, iPhone SDK and Xcode). Each topic is divided in to subchapters as it’s simply not possible to teach users all this information in just 1 article.
» Learn to program for the iPhone.

Ok, this has to be the longest title i have ever written!
But it is actually correct.

Project mono is a ambitious project that will enable us to run .net, java, python and visual basic apps on almost any platform.

and yes, our beloved iPhone will also be able to do it.
The program is still in early beta stages, but a simple ‘hello mono’ app is already working.

check out the movie.
» Run .net, java, python and Visual basic.net apps on your iPhone/iPod Touch with Project mono