Out of sheer boredom last night, I decided to whip up a mobile view for my blog.
It was extremely easy thanks to the mobile-fu plugin by my friend Brendan. I also found a few tips and tricks from this post on the Engage Interactive blog such as how to handle orientation changes and how to specify an image for home screen bookmarks.
I did most of my testing via the iPhone Simulator from the SDK and also a Fluid browser which allows you to specify mobile safari as the user agent, giving you the proper look, and you can use Safari's built-in Firebug-like tools.
If you've got an iPhone, give it a look...