1. A method of providing demographic visitor information to a participating web site, the method comprising: registering a user with an information gathering system, wherein the information gathering system solicits personal information from the user and wherein the information gathering system maintains a profile for the registered user; detecting a visit of the registered user to a participating web site, wherein the participating web site is operated independently from the information gathering system; and providing a demographic information report to the participating web site, wherein the demographic information report is related to at least one registered user who has visited the participating web site.