We just built this Big Dummy up for a long-time customer. It was built up with the express purpose of hauling kids around safely and comfortably-- as well as replacing the family minivan. The build started with a complete Big Dummy from Surly then we upgraded the P-racks from Xtracycle with their heavy duty versions to better handle the load of two kids and their bikes. Over all the build finished nicely with a Yepp PeaPod III kids seat-- it is easily the most elegant design of a child's seat I've seen in a while.
As a whole, bike builds like this are what get us really excited. The movement towards families commuting by bike is still new in Atlanta, but when we build a bike like this we realize that there is a real shift happening in our city now! It is awesome!