Tom Petty once wrote "the waiting is the hardest part", though that was probably mainly because he never had to listen to his own music. Still, waiting is hard, which is why there's ZocDoc.
Just launched today in Chi, ZD's basically an OpenTable for real-time doctor's appointments, presenting a buffet of 150,000 Chicago docs and each ones exact availability; our city was picked overwhelmingly in an online vote to be the NYC company's next market. So eat a fat D, Olympics. Simply supply your address and insurance provider and they'll provide a list of participating docs with avail times (as soon as same day), plus their resumes and reviews posted by other users, because who better to trust regarding medical practices than bankoklvr29, who appreciated their sensitive handling of his late-stage syphilis. Once you've settled on a physician and picked an appointment, just provide them the impetus for your impending visit, and you're cool. Well, other than that rash, but hey, that's why you're going.
Though there'll be more to follow, at launch they're rolling out three specialties: primary care, dermatology, and OBGYN -- perfect if your jam is "I Need To Know".