Logmein Ignition; Remote Control Software for iPhone

Meh. Control via safari on iphone using http://cre.ations.net/creation/webvnc---remote-desktop--vnc-...

Free. Source included. I've hacked some process control into mine. Works great.

I guess if you're power user enough to want remote control, but not quite power enough to keep track of your own ip and make a port forward, you pay for that service with something like this.