BooksJeff Lamarche and Dave Mark. It takes you from downloading the SDK to creating your very own apps. The official page and support site: http://iphonedevbook.com/
here. They also have movies at this site that demonstrate what each mini-project does.
BlogsDan Grigsby and Ari Braginsky. I recommend you start with the top posts on the right sidebar and go through all the archives. Pretty much all of the articles are gold.
Jeff Lamarche is also the author of Beginning iPhone Development: Exploring the iPhone SDK. He keeps his blog updated constantly with cutting-edge code and even a guide to surviving WWDC.
How to Detect Network Availability.
Jeff Scott writes about various iPhone app marketing tips and analytics. The blog is focused on the business side of iPhone apps. It’s fairly new and looks very promising.
John Muchow. The posts are put together in nice bite-size pieces.
Bill Dudney is an author/screencaster with the Pragmatic Programmers family. The books and screencasts he makes are good for beginners, but a lot of the stuff on his blog address more complicated coding issues and bugs in the SDK.
Podcasts/ScreencastsLoren Brichter of Tweetie fame when you get a chance.
Coding in Objective-C 2.0 and Becoming Productive in Xcode screencasts. Follow that with the five-part Writing Your First iPhone Application screencast. If you really want to get fancy with transitions and animations, check out the Creating a Compelling User Interface with Core Animation screencast.
Matt Gemmell has some great code out there for the community, including MGTwitterEngine, the Twitter API used in iPhone apps Birdhouse and Twitteriffic.
Communities/ForumsChris Stewart’s site boasts nearly 6,000 registered users. The forums are very active. You’ll find yourself visiting this site at least once a day.
Bill Dudney and Daniel Steinberg in this four-day training course. The next one runs August 4-7, 2009 in Reston, Va.
Raven and Dom. The event format is “unconference” or Barcamp-style, featuring content from the participants themselves. There are satellite events held all over the country. The next one is this August.
Other Collections Of Resources
Mobile Orchard crew.
Create A Drum App tutorial.
Those are my favorites. I’m not a human Google, so I may have missed some gems. What are your favorite iPhone developer resources?