MKAbeFook for Facebook. Uses the WebKit browser with asynchronous requests, photo uploads, and much more. It can call any API method and returns the result in standard Cocoa types. It is distributed under a BSD style license.
Map mashups continue to mature in terms of sophistication and functionality, providing end users with an ever-expanding set of tools and applications. As a result, the intersection between traditional geospatial data and these new mashups requires well defined ways to transfer, distribute, and consume geospatial data in a web-friendly way.