Credit to TreeHugger for the link to this video.
This video shows a very impressive household move by a group of friends by bicycle! Very impressive. It is definitely an incentive to not accumulate too much cargo. Light furniture is also a plus. There are also some impressive cargo carrying bikes in the video.
Update: Here are some pictures and videos of another household move by bicycle. This just proves that I am way too lazy when it comes to the errands that I use the car for.