If you're a blogger I recommend you try out this new site I found this evening: www.testiphone.com. It's a web browser based simulator for quickly testing how your blog looks on an iPhone.
I know I'll be using it. I discovered today that Google Analytics tracks how many visitors have been accessing my blog from mobile operating systems like iPhone, iPad, Android and Blackberry and, unsurprisingly, there is a long term upward trend. Even though my blog is anything but optimized for mobile as this sceenshot from the iPhone simulator shows.
I'm thinking it may be worth introducing an iPhone optimized mirror page. If mobile computing is the future (and I believe it is) then bloggers, Christians and otherwise, need to gear up. If you see anyone optimizing well be sure to share it around.