WPtouch detects if the browser is an iphone/ipod touch and loads a mobile friendly theme optimized for the iphone. all this is done in a plugin so you won’t have to mess with themes it’s all detected and run at run-time.
the interface is nice and clean and the ajax calls makes the blog viewing seem more application-like.
the only thing i don’t like about it is that you have to click a title to read any blog. the first blog isn’t show by default. i guess it’s a design design, but that’s an extra click (touch :P) before you can start reading anything. form over function? i think it’s worth it.