Dada.net

Though it was built with cell phone users in mind, Dada.net takes a completely different approach than Dodgeball does. A kind of mobile MySpace, Dada.net lets you create and customize a personalized home page--and more important, upload photos, videos, music, and blog posts. And you can do all of that from your phone's Web browser (or from your PC).

The service makes some of its income from the Google Ads its members view. You can share in the revenue if you have a Google AdSense account: The greater the number of people who see your profile and its ads, the more money you and Dada.net make. For that reason, you'll start receiving friend requests right away from people you don't know; however, the site's privacy settings let you screen out most of those unwanted inquiries.

Dada.net also specializes in hooking you up, and provides a "Love" profile separate from your "Friendship" profile. Many of Dada.net's mobile services are available for free, but some others--including "Love" chats and cell phone ring-tone and wallpaper downloads--require a monthly subscription that can run as high as $10 per month, so be sure to click cautiously.