Here is a list of great resources to get started in iOS development.
Work in progress…
Objective C Links
Apple’s Objective C Programming Guide – Apple Link
Objective C Programming – The Big Nerd Ranch Guide – BNR Link
Programming in Objective C by Stephen Kochan – Amazon Link
Objective C for the Absolute Beginner – Apress Link
Learn Objective C on the Mac – Apress Link
Pro Objective C Design Patterns for iOS – Apress Link
iOS Programming Links
Apple’s Online Developer Library – Apple Link
iOS Programming – The Big Nerd Ranch Guide – BNR Link
Beginning iPhone 4 Development – Apress Link
Tons of other Apress books – Apress Link
Other Mac Programming Links
Cocoa Programming for Mac OS X – The Big Nerd Ranch Guide – BNR Link
Advanced Mac OS X Programming – BNR Link
Online Courses
Treehouse Web & iOS courses – http://teamtreehouse.com/
Stanford Engineering Everywhere courses – Stanford Link
Stanford iOS Programming Fall 2010 course – iTunesU Link
Stanford iOS Programming Fall 2011 iOS 5 course – iTunesU Link
Blogs
Jeff Lemarche – http://iphonedevelopment.blogspot.com/
Ray Wenderlich – http://www.raywenderlich.com/
Aaron Hillegass (personal blog) – http://www.possibleprobable.com/
Big Nerd Ranch weblog – http://weblog.bignerdranch.com/
StackOverFlow iOS – http://stackoverflow.com/questions/tagged/ios
Nick Dalton – http://iphoneincubator.com/blog/
Podcast Links
Mobile Orchard – http://mobileorchard.com/category/podcast/
Arltices like this just make me want to visit your website even more.