Curt, maybe you should try to check Lars' PAW pages. Since I read those and other pages about the photo-a-week project (well, ok, only 3 days ago...), that I've convinced myself about following this project and carry my camera with me on my 'normal' life.
I cannot speak about results yet, and probably it will be difficult to find a really good one

but at least, I enjoy having (and using) my camera on a daily basis, and I must admit I've found some pictures that deserved to be taken, or this is what I thought then... so I didn't regret bringing the 1 Kg aprox. Zorki3M+J8 with me...
Its easy with portable cameras such as 35mm rangefinders, and I'm still waiting the Isolette to arrive from UK to see if it really works as it should... Maybe you could try to establish some turn system in order to use each camera periodically.
This said, I think it's going to be difficult to choose another one and leave the 3M at home...

as Jim Blazik said, these things are flat lovely !