Spare bed? We are so far behind when it comes to designing for small spaces. Take the Aero Bed. It has been a huge hit in New York, but it took years for someone to think that up and it ain't too pretty. Try this.
Designed by Italian, Denis Santachiara, the Pisolo or Magic Pouff is a small stool that contains an inflatable mattress with a built in pump. Extra seating turns into an extra bed with a bedside table. It is for "neonomads," and it's cute. Available for 256 Euro at Proform.
Santachiara has also designed a chair version of this (the Pisola) AND a very cool light that projects "counting sheep" on the wall of your bedroom.... (Thanks, Funfurde!) MGR