As long as we're thinking about unusual Apple products, let's remember Macintosh TV: http://en.wikipedia.org/wiki/Macintosh_TV
Another odd duck was the PoweCD. I owned one of these to go with my Duo: http://en.wikipedia.org/wiki/PowerCD
Did I say Duo? These dockable ultra-portables were fun: http://en.wikipedia.org/wiki/PowerBook_Duo_2300c