Someone asked what someone is doing third year, and being that I'm totally stoked for mine, I'm going to respond to that question.
I'm working in the plastic surgery lab; my main project is an orthopedic-related biomaterials project in which I will be putting NO-releasing compression plates into bunnies and inoculating the wounds with bacteria, then I'll sew the bunnies back up, wait 8 days, then explant the compression plates and track the rates of established infection in the NO-treated implants versus controls. It works damn well with silicone, and if it works well in orthopedic devices that has a lot of implications for practical application since the biggest problem with replacement joints and any other sort of orthopedic hardware is infection.
Hopefully I'll get to stick my fingers in some of the other awesome projects going on in the plastics lab, too. One paper put out about a year ago involved swapping the faces of 4 fresh-tissue cadavers to look at what technical and anatomical elements will be key to keep in mind for the development of facial transplant technique. It was pretty sweet.