Peoplefinders.com is a great online source to look for and find people. They have just recently released a new option called "jax". This tool uses AJAX scanning methods that look through billions of public records in just a few seconds. It gives the user the ability to enter partial information and still run a comprehensive search. For instance, if you only have a last name, first name, part of an address, state or even just a date of birth you can still scan the records. The more information that you have the more accurate and comprehensive the results will be. JAX even links roommates and relatives to your criteria. This new technology will greatly increase the ease when it comes to finding someone.