I often use this blog for my own reference, and often access it from my iPhone. Though the iPhone renders the blog wonderfully in full, having to zoom in and out to navigate around the blog is a bit of a pain in the backside.
While browsing through the sea of wordpress plugins - a lot of good stuff, some of them weren't so helpful - I've stumble upon WPtouch, which seems to be the best plugin for making WordPress blogs render in "mobile" mode. It detects if the client is a mobile device (iPhone/iPod/Android), and automatically applies a very well-polished iPhone-themed style with various JQuery visual effects, all with one simple Install -> Activate.[gallery]