Here's a nice description of how to do it.
http://www.gator-ventures.com/bamboo...ermination.htm
But wait until spring, because if they experience low light conditions as a seedling after germination, they'll rot. Else use growlights and keep them warm through the winter.

Once established, reputedly hardy to -18C (0 F)

For more discussion, there's practically a forum branch dedicated to flowering and growing bamboo from seed here.
http://www.bamboocraft.net/forums/forumdisplay.php?f=92