They do build bamboo homes in the Tropics and most probably did use hemp to hold it together... Derek thanks for pushing the issue, interesting stuff.
http://www.bambooliving.com/homes.htmlhttp://www.bambootechnologies.com/"Bamboo is versatile with a short growth cycle. It can be harvested in 3-5 years versus 10-50 years for most softwoods and hardwoods. Bamboo is the fastest growing plant on this planet. It grows one third faster than the fastest growing tree. Some species grow as much as four feet a day. Thanks to its rapid growth, the yield (weight per acreage and year) is up to 25 times higher than that of timber."
Even books on bamboo building...
http://www.amazon.com/New-Bamboo-archite...2133&sr=8-1