They are the 330, and in one of his most recent interviews for MSNBC
Bigelow stated that astronauts who have visited his complex are "flabbergasted" at how spacious they are.
Astronaut visitors to the module mockups "are flabbergasted by the volume...they are really taken aback by how large these are," Bigelow said. "We are actually looking for a couple of astronauts now to join our marketing program."
the bottom will be the outside"
Rotational gravity? In all my digging about BA's modules I've never seen anything about rotational gravity, and once attached to a hub/power bus and other modules in the way Bigelow has presented that would be impossible.
What I have read is that the core provides rigidity, especially during launch, and stowage for gear and provisions before and during launch. On orbit and after inflation this is removed and placed in their use/storage areas. Conduit and airflow goes through the compartments inside core framing members, as per one of the patents*. Berths, exercise and work areas are arranged as shown in drawing 1 in every Bigelow generated concept I've seen.
Abut the Sundancer schedule slip - that has more to do with the economy causing Bigelow to slow down than SpaceX (separate news report). Seems Bigelow hasn't built the construction hangar for the large modules yet, though it should be done this fall;
One key item on tap for Bigelow Aerospace this year is constructing the A-3 building, Bigelow noted, a structure that will offer 265,000 square feet and is destined to be an assembly-line facility for the company's spacecraft.
(one example - variants are shown)