Interesting notes about search optimization in the App Store
» iPhone Application Marketing: Reviewing Current Websites :: Positive Space Blog
Memory Management with Cocoa/WebObjects
A good article on understanding retain counts, etc. in Objective-C.
Finding iPhone Memory Leaks: A “Leaks” Tool Tutorial
Excellent tutorial on using Leaks to find memory issues in iPhone apps.
MDNS and caffeine: How I got Bonjour running on my iPhone
Getting Bonjour to run on the iPhone
XCode templates for iPhone static libraries with unit testing | Coding Ventures
Excellent article on making it easier to set up static libraries for unit testing.
Wizzley Presto and the Mysterious Time Machine
Very intriguing article on making a pretty decent iPhone game in less than 30 days.
Interesting iPhone app which animates 3K particles
eddit: Shop: iPhone UI Icon Set
Great set of iPhone UI icons.