Photographer Zack Arias has put together a five-part discussion about how to build a space for shooting people on white seamless, and all the different ways you can make it look. Great post! This is one to bookmark, or send to the Mrs. when she wonders why you want the basement to be 20' x 40' x 14' high. :-)
I don't have quite that much space (yet) which is fine since I mostly do products on the white seamless, but the concepts are sound. You can scale it all down to a smaller size for tabletop work.