The SmartLinc is a very intriguing controller for do-it-yourself home automators. It's a lot like a standard controller, but connects to your home network so you can send it commands from over the web.
And the latest version has a web-interface that's optimized for Safari on iPhone and iPod touch. In fact, you can even get a free iPod touch when you buy an INSTEON starter kit that includes a SmartLinc. (Limited time offer, as noted on this page.)
Now, a couple of words about the SmartLinc. First, I haven't tried one. (But I'd like to soon.) Secondly, it's a standalone controller so you don't need a computer connected to it. You set up timers and so on using its web interface, then leave it alone (plugged-in, course) to just do its thing. This is an attractive alternative for people who don't want to dedicate an always-on computer to running their house. Finally, it doesn't work with X10-based modules, it only works with INSTEON. Again, this can be an advantage for people who don't have a slew of ancient X10 boxes already installed.
Update: August 13, 2008. The NetLinc has been renamed to "SmartLinc" so I've updated this post.