I've just released an iPhone app that allows developers to write Objective-C on the go. It is especially written for iPhone and iPad developers. If you are interested then head over to http://lightbulbapps.net/apps/objective-c-coder/.

I'm a developer for LightBulbApps.net and program in a range of technologies on a daily basis: VB.NET, C#.NET, MS SQL, MySQL, PHP, Objective-C. We concentrate on mobile applications mostly which include mobile web applications. I find the mobile world of development fascinating, so if you have any resources regarding mobile development then I would be grateful if you let me know.