Ok, so for more info on housing - there is a Duke housing website that Richard Wallace or someone from admissions will send you a link to. You can check that out to look at housing options or search for a roommate. If you know where you want to live, you can put up a posting yourself and find roommates. This is a good place to start.
So, your options will probably be to live in a townhouse or an apartment complex. The advantage to living in a townhouse is that rent is *usually* cheaper than living in an apartment complex, depending upon which townhouses you live in and how many roommates you have. The advantage to the apartment complexes are that they usually have shared laundry facilities that you can use if you choose not to have the machines in your apartment, and there's usually some type of (not so great) gym and maybe a pool. Depends upon where you look.
As far as apartment complexes go - I don't know a lot, maybe some of the other Duke students can chip in, but here's what I've got.
-Deerfield - fairly popular, one of the less expensive apartment complexes. I think it's about $800 for a 2 bedroom/2 bath. The bedrooms are decent sized (although one is definitely bigger than the other). Also, Duke forest is basically in your backyard and there are trails for hiking/jogging/etc. And it's really close to Duke, probably like a 3 minute drive? Definitely bike-able, if you're into that. The disadvantage is that it's down this long, dark road and it's kind of out in the forest, which I know makes some people uncomfortable at night. But I don't think they really have problems with crime at all. Has a pool and a gym.
-North Pointe - slightly more expensive than Deerfield, but not by a lot. Bedrooms (in both 2 and 3 BR) are closer in size than the ones at Deerfield and I prefer the set up better, but the living room is pretty small. Also has a pool and a gym. I think the fastest way from North Pointe to Duke is on the highway (I could be wrong about this), so it would be harder to bike.
-Alexan Place and Alexan Farms - I can never remember which is which, one is an apartment complex and the other is townhouses I think? These are really nice, but more expensive (~1000 for a 2 bedroom). Again, you'd probably take the highway to school. Maybe like a 5 minute drive to Duke.
-The Lofts - these are literally across the street from Duke. The walk from here is probably about as far as the walk from our parking garage. They are super nice but also super expensive (~1000+ for a studio).
These are the more common places that people tend to live. I know there are some other complexes that I'm missing, and I'm sure someone will fill them in at some point. If you check out this link
http://www.duke.edu/web/medstudent/
there are some more reviews of the different housing available. Let me know if you have any specific questions and I can try to answer them.