They're following another industry trend, as recent issues have had a number of iPhone articles. Many compare one Windows Mobile phone or another to the iPhone, wondering if a Sony Ericsson EXPERIA X1 or HTC Touch Diamond is going to be the "iPhone Killer".
I was glad to see that the magazine is looking beyond the comparisons to a special iPhone edition ($14.95) to be published in August (cover mockup at right). A quick glance at their Web site showed that TUAW is one of the "Best Web Sites" for iPhone, so they're obviously doing their homework. ;-)
The publication date in August ensures that many of the App Store products and iPhone 3G accessories to be announced will end up in the special edition. It should be a fun collectible to look at 10 years from now!
In the interest of full disclosure, I've been on the Smartphone & Pocket PC Board of Experts for several years, evaluating software for the annual Best Software Awards issue.