For all you web developers out there (or people that have toyed with JavaScript / HTML / CSS / PHP), this might interest you. In the same type of class as Adobe Air, Appcelerator Titanium is a development environment for developing applications using existing web technologies. It mainly focuses around JavaScript, but you can use PHP, Python, or Ruby (depending on the target platform). The most interesting part of this is that you can also develop mobile applications (such as the iPhone and Android). Last I heard, they are actively developing an OpenGL module for use on the iPhone - but you can still make some decent games using CSS3 and HTML5. So while we are waiting for an official release of SDL for the iPhone, this may be a good alternative. It's also good for developing Desktop Applications rather quickly, when you don't want to waste a whole lot of time.

Check it out here: http://www.appcelerator.com

Warning, music is a bit loud