Useful Mac OS X and iOS Links for Developers
http://www.iphonedevforums.com/forum/index.php
http://iphonedevelopment.blogspot.com/2008/06/web-services-core.html
http://www.cocoadev.com/index.pl
http://cocoadevcentral.com/d/learn_objectivec/
http://pragmaticstudio.com/screencasts
http://www.mobileorchard.com/find-iphone-memory-leaks-a-leaks-tool-tutorial/