Patient sites for groups and individuals are booming — so much so that they are increasingly used by researchers to find patients for studies. These include the Association of Cancer Online Resources (ACOR) (acor.org) and e-patients (epatients.net), as well as Patients Like Me and Trusera (trusera.com), which provide a bit of Facebook-style social connectivity along with the ability to share their stories in clinical, data-laden detail.