I just finished helping Marcus post an article on our new site Cocoa Is My Girlfriend, a site dedicated to providing blog posts and tutorials on how to develop applications using Objective-C and Cocoa on the Macintosh.
This first post is on how to use the new threading objects found in Mac OS X Leopard (10.5) called NSOperation and NSOperationQueue. They provide a really simple and robust way to do multi-threaded programming. Take a look at the post and let us know what you think.