www.71squared.co.uk/

This is a great Web site that focuses specifically on iPhone game development. It is updated often with new material.

http://148apps.biz/

There is a good focus on the business and marketing realities of iPhone application development.

http://appsamuck.com/

Famous for the 31 days of iPhone applications, this is the site that many of the apps in this book originated from.

http://howtomakeiphoneapps.com/

This site has a wealth of material on how to create iPhone applications and how to market them.

http://icodeblog.com/

This blog is focused on iPhone programming and has many detailed iPhone programming tutorials with source code and walk-through screen shots.

www.idevgames.com/

Billing itself as the Mac and iPhone Game Developer Community, this site features articles, interviews, news, reviews, tutorials, and forums.

www.iLounge.com/

This is another useful site that you may want to check out. While iLounge is not directly about iPhone development, it offers many game reviews and comparisons in the "iPhone Gems" series that serve as useful references to what's out there.

http://developer.apple.com/iphone/

The iPhone Dev Center provides access to technical resources and information to assist you in developing with the latest technologies in iPhone OS.

www.iphonedevsdk.com/

This site has a large number of moderated forums dedicated to programming with the iPhone SDK.

www.iphonesdkarticles.com/

This site contains a series of iPhone SDK tutorials. There are forums and an iPhone programming-related blog as well.

www.mobileorchard.com/

Mobile Orchard is a great iPhone programming blog that has podcasts, tutorials, and more. Be sure to check out the top posts links.

www.tuaw.com/

Although not entirely devoted to iPhone programming or even to the iPhone, this site consistently manages to find out the latest news before anyone else.

www.wileydevreference.com

Check out this Web site for links to all of the books in Wiley's Developer Reference series. Click on the link for iPhone Game Development to see code listings for this book.

By Jiva DeVoe

Wiley, 2009

This book covers the Cocoa Touch framework that you need in order to develop for the iPhone, as well as the entire iPhone development process from provisioning to utilizing a complicated database backend in SQLite. It offers easy-to-understand tutorials and discussions to help you create unique user interfaces and powerful applications.

By Paul McFedries

Wiley, 2009

This book is like a mini Genius Bar all wrapped up in an easy-to-use, easy-to-access, eminently portable format. It's the perfect companion for learning how to use your iPhone to the fullest.

By Andy Ihnatko

Wiley, 2009

This one-of-a-kind reference shows iPhone and iPod touch users how to put anything and everything on their Apple iPhones or iPod touches. It is done completely in color and covers everything from basic iPhone instruction to advanced topics to software recommendations.

www.extension.washington.edu/ext/certificates/iph/iph_gen.asp

The University of Washington offers a certificate in iPhone and Cocoa development. The program is for experienced developers and sets out to show developers how to design, build, and sell their own quality iPhone applications.

http://itunes.stanford.edu/

Stanford University posts their iPhone Application Programming class on iTunes for everyone to listen to for free. Subscribe and you will have some of the best computer science professors in the world teaching you iPhone programming at no charge.

http://developer.apple.com/products/videos.html

If you were not able to attend the Apple Worldwide Developers Conference (WWDC) in 2009, you can still purchase all of the session videos from the conference. Even if you were able to attend, this is a great way for you to go back and catch the sessions you missed. There are sessions on iPhone development and Mac OS X development. And for $499, you can purchase all 126 sessions.