UPDATE: this question is obviously obsolete (see the date). I recommend just using modern iOS7 features like NSURLSession. The question is preserved for historical accuracy, I guess.
What’s a good HTTP library for (desktop Cocoa and) iPhone? Should just have a good interface to the basics like HTTP headers, get/post values (request string creation, URL encoding/decoding), sync and async requests… preferably pure Obj-C implementation. NSURL* is somewhat lacking.
Check out All Seeing Interactives ASIHTTPRequest library