if you've been thinking about coding for the iPhone, or learning more about the Linden Scripting Language (LSL), my good friend Ludvaig Lindman has just set up a forum for like-minded individuals to post questions and learn from each other.
please do consider visiting friendlydeveloper.com and signing up as a member.
there are separate sections in the forum for HTML, PHP, LSL and iPhone development.
in the latter, Ludvaig has posted a 33-minute-long video tutorial, which comprehensively walks you through the process of creating a simple iPhone applet which swaps images when one drops one on top of the other. to have a look at this simple walkthrough of this aspect of Xcode and the iPhone SDK, go to 'iPhone Development' -> 'Tutorials' -> 'Video Tutorials'
happy coding :-)