Pending Apple’s approval, the PadMapper iPhone app should be in the app store on Friday. I decided to charge $0.99 for it to subsidize the cost of running the web version a bit. Hopefully noone will be terribly offended :-).
It doesn’t have every feature I’d like to put in there, but it does the basics pretty well, provided you live in a big city. You can check out the app’s description/support page at http://tophatmonkey.com/padmapper-iphone.html .
I’ve got a couple of features I plan to include in an update, but currently I’m working on the code for the website to let people post their own apartments, so I’ll have to come back to the iPhone after that’s done.