White Pages
You’d think that looking up a phone number would be a perfect use of an iPhone. But White Pages sites don’t seem to recognize the mobile market at all. I tried most of the major white page services and none had mobile interfaces. One well-known name linked me to another site entirely, and that site gave me a crappy pop-up ad on the page. I was not pleased. And the mobile offerings by Yahoo and Google don’t seem to have any white page services. I found plenty of downloadable phone applications, none of which work on the iPhone.
I found one site at http://people.aapl.org.uk that has an iPhone interface for a people database. Ironic that I have to use a UK site on a US phone to look up US phone numbers. Seems to work, though.
If you know of another white pages site that works well in a mobile browser, let me know.