very curious about this as well. our apartment has really thin walls, so I wonder if something like the Leonardo would be viable--I'm afraid that the weight of the bikes would totally wreck them.
anyone use any other sorts of solutions? right now, we just store one bike in the living room, and another in the bedroom. less than ideal for a small San Francisco apartment. we were thinking something like the Delta Boticelli four bike storage rack--standing and stationary. can anyone recommend one?