WordPress.com has turned on a mobile web theme for all blogs hosted on their site. Those browsing on an iPhone or other mobile web device will now see the blog in the format below. It is much easier to use the site than before. I know I will appreciate the new theme on my iPhone 3G.
The New Media Interchange Community Site (and all Ning.com based sites) have had a mobile theme for a while. Here is an example of how it appears on the iPhone.