The staff has been used as a weapon in many different cultures, and all have developed specific fighting techniques. The Japanese call it a "bo", and thus "bojutsu". The technique is influenced both by Okinawan "ko-budo" (ancient weapons) and by traditional Japanese use of battlefield weapons like the iron staff.
Europe had it's own traditions, of course, witness the famous "duel" between Robin Hood and Little John. The staff was widely used for both personal defense and in warfare.
The Chinese and the Filipinos have well-refined schools of staff fighting.
In short, there's plenty of material to study. The Filipino styles are extremely practical and the principals apply to other weapons.
Chinese staff work I've seen lately is very formalized and gymnastic, and doesn't look very practical.
The Okinawan-derived methods are pretty solid as well.
Here's a book I just found as the first Google hit on European staff fighting:
http://www.thearma.org/staffbook/staffbook.htmEnjoy!