http://www.pbase.com/pstewart/rooms
I used the 15mm setting for nearly all these photos...see what you think.
Many needed some degree of perspective adjustment in Photoshop. Most had shadowy corners and some had darker left and right edges, since the flash claims to handle wide angle lenses up to 17mm and I was using 15mm, pushing the limit a bit. Not too noticeable on some pics, and I brightened most of the dark edges/corners in Photoshop or cropped them off (mainly for the sake of a less cluttered photo in each case).
This sample pic shows how well the 15mm performed, since this display is set up along the wall in the ladies' restroom, which is only about 7 feet wide, so I couldn't back up very much.

http://www.pbase.com/pstewart/rooms