And here's some links I've found recently, now that I've chosen a development platform for iOS - having decided that, essentially, re-learning ANSI C++ with a new IDE (that I can't find any straightforward videos for [the latest version of XCode works slightly - but importantly - differently to that demonstrated in all the online tutorials]) is not my cup of tea...
- GameSalad - no-code game builder:
http://gamesalad.com/ - Appcelerator - javascript/HTML based apps for utilities, not games:
http://www.appcelerator.com/ - Corona - 'lua' based 2D development, for 2D games and utilities. My weapon of choice:
http://anscamobile.com/ - Cocos2D - Objective-C games framework for 2D games:
http://www.cocos2d-iphone.org/about - Unity3D - full 3D gaming development system, producing some awesome results:
http://unity3d.com/ - Rhodes - for a mix of things, closest to Corona, I think. Ruby on Rails:
http://rhomobile.com/products/rhodes/ - Sparrow - open source development for those who know a little Objective-C:
http://www.sparrow-framework.org/ - Some very useful links if you're looking for a broad range of programming info:
http://iphonedevdepot.com/tiki-index.php
I've found that for ease of learning the new language and a solid output, Ansca Mobile's Corona platform is performing well, has plenty of good tutorials and material and after the Apple iPhone Developer 1 year license ($99 in the USA, £59 in the UK), the Corona or Corona game license isn't too pricey. Though that might change soon...