No need to spend time on studying Objective C and cocoa to create iPhone apps.

Hello Friends,

Those who interested in starting developing applications for iPhone may be looking for books of cocoa and objective C as the official iPhone SDK uses these. But there is certainly no need to spend time in studying objective C and cocoa because there are many third party frameworks are available in market which use of code written in languages like good, old-fashioned JavaScript or newfangled Ruby and give the user complete control of the screen, just like a native application.

Few named here, Rhomobile Rhodes, Nitobi PhoneGap, Appcelerator Titanium, and Ansca Corona.
These toolkits also offer cross-device development, your software will run on an iPhone, a BlackBerry, an Android handset, and in some cases even a Symbian phone or a Java ME phone.

So why to wait, enjoy coding...
For more info please read following article..

http://www.infoworld.com/d/mobilize/iphone-development-tools-work-way-you-do-309

Thanks
Amit