ZocDoc.com is a site with an interesting concept — you not only search for a medical specialist in your area, but you actually schedule an appointment with that doctor right on the ZocDoc site. Not all doctors are listed there of course, but iI can foresee more and more doctors sign up for the service. Here is the description from the site:
ZocDoc is a free service that allows patients to book doctor appointments online.
ZocDoc started in September of 2007 as a service to help people find and make dentist appointments in New York City. Today ZocDoc also offers primary care, dermatologist, eye-specialist, ENT, orthopedist, OB/GYN, allergist, podiatrist, cardiologist, pediatrician, radiologist and psychiatrist appointments in New York City, Washington DC, San Francisco, Chicago and Dallas.