I've been able to shadow physicians in many specialties. One of them was a pediatric orthopedic surgeon, who I had actually seen quite a few times recently, so I asked him if I could shadow him, and we were able to arrange it so that I got to see a few surgeries as well as follow him in clinic. For the others (emergency medicine and neonatology) I got their names and e-mails off of the website for the local university affiliated hopsital. I am currently shadowing both of these docs, each once or twice a month, and find it both very interesting and fun, but I am also learning a bunch of things. I encourage you to either e-mail a doc or call their office and ask them if you might be able to shadow them, or if you happen to know one in your area ask them first. Good luck,
Jordie