I finally got around to updating the plugin creation tutorial for Xcode 4. Thanks to Robert Vehse for giving me edit privileges and Spenser Jones for the article that I borrowed from so heavily.
You can find the tutorial here: http://trac.adium.im/wiki/CreatingPlugins Please take a look, and feel free to make suggestions. This was just a first pass, and it was my first attempt at a plugin, so I imagine there are plenty of mistakes.
