As I would like to advance an open source program's development: How much of an effort would you think is it to learn to program less sophisticated programs for Mac OS X and iPhone? It is quite some time since my programming days. I do have general understanding of object oriented programming, Unix, several programming languages but never have done any programming on Mac OS X. The program involved would be of the kind displaying text and pictures from a database (possibly simple text database), and interacting with it. And how do I best get started with Xcode etc? On a related topic: How do I find good programmers to do such work, both on Mac OS X and iPhone? Quite possibly I'd be best qualified to lead the project, ie specify features etc. TIA Marc