In the March, 2005 edition of Popular Science, accompanying Michael Belfiore's nice article about Bigelow Aerospace, is Mondolithic Studios' fascinating visualization of CSS Skywalker, an hypothetical Bigelow Aerospace space station. It seems like a good time to reference it, now that Bigelow has flying hardware.
This looks to me like a 10 Nautilus station plus an observatory module or control center module of some sort. The station consists of probably around 4,000 cubic meters of usable volume total. This strikes me as an enormous volume -- about 20 times the volume of my small studio apartment.
There are no rotating modules, which I think you would like in a station of this size. Gravity is important for going to the bathroom and for taking a shower, if for nothing else. I don't know if you would get seasick by moving into and out of gravity often, however. Maybe the whole station would need to rotate, except a module or two to provide the weightless experience.
Update: Chris Wren at Mondolithic Studios was kind enough to write to explain some aspects of the station.
[W]e went with the idea that one or more of the habitat modules would have a small certrifugal exercise wheel inside, like a hamster wheel. No one is really sure how to supply water/air/power to a fully rotating module just yet, so we figured we would leave it out... One other option would be to arrange the modules in a vast ring, and spin the ring, a la 2001: A Space Odyssey.
Here's a post of mine regarding the 2001 station.