I just got a press release saying that the free WhitePages Mobile is used by over 2 million people on a variety of platforms. And I'm going to be one of them. I can't remember the last time I used a phone book, since I've long been in the habit of using Google for a phone number lookup. And now when I'm away from my computer I can conveniently use WhitePages Mobile for lookup. Plus, it has quite an array of useful features. You can use it for people and business search, as well as for reverse lookup (find out who's associated with a particular phone number). Once you find a number you can easily save it to your Contacts. A GPS feature lets you access maps and directions based on your current location. And there's a convenient click-to-call feature when you find the listing that you want.