I’ve been dabbling in Cocoa off and on for a few years now. Besides doing examples from various books, I’ve developed a couple of applications: an HTML editor with preview and an bug tracker. I’ve gotten some good advice and help from the Cocaheads group that meets in Colorado Springs, so I’d like to thank them publicly here. If you have a Cocoheads group near you, look them up, they’re a great resource.
Cocoa in Miniature 