I don't go to OHSU, but I'm from Portland and was accepted there. All of the places mentioned above are great recommendations!!! As for something a little different, if you have time, I would recommend going to see the campus. Two main reasons for doing this:
1. Go walk around Doernbechers Childrens Hospital. It's such a wonderfully designed space, and it will really make you fall in love with the school
2. Get to know your way around!!! I'm guessing that the tram construction is still underway (they are building a tram that will run from campus -on the hill- to near the riverfront -at the bottom of the hill-, very neat idea) and that can make getting around campus as a first timer a pretty confusing experience. Parking is really hard and very in demand, and so if you're going to be driving to your interview you may want to inquire at the security gate as to where they allow visitors to park, then visit that parking lot and see how long it takes to get to the admissions office.
Hope you like it! I was very close to accepting their offer, I loved everything about the school. It just came down to what school would fit me best. Portland is the greatest city, have fun!