The Mason-Dixon books/patterns have the DIZZY RUG.
They also have the CIRCLE OF FUN RUG!
They also have the KIKI MARIKO RUG!
They also have this rug,
which is my favorite, although it's not round. It's my fav!
All of these rugs are viewable on Ravelry. Just type in Mason-Dixon rugs in the pattern search.