I have stumbled across a quite nice introductory course on iphone programming on iTunesU. Its from the university of Utah and they got a nice video podcast along with slides and some sample code. Definitely a good way to start developing for the iPhone.
Update:
Another course can be found at
http://www.stanford.edu/class/cs193p/cgi-bin/index.php
However, I havent had time to check that one out yet.
If you are an audiobook fan like I am, then you probably often wondered how to create nice audiobooks with chapters and all. I am such a guy and have been using Audiobook Maker for a while since its open source and free. However, it has a few shortcomings that made me want some modifications. Unfortunately, it seems that the author has stopped maintaining the app and thus I went to work and made the changes I needed.
Changelog
I will ask the developer to integrate the changes, if not, I will post the sources here.
A big thanks to the guys at
http://www.tkn.tu-berlin.de/research/evalvid/
and
which tools I have used in order to process mp4 files.