Qui_Gon_Jinn_85
Master Swordsman
I am not completely sure of the outcome. I can go based off of personal experience though. I have been studying jujitsu for a length of time now, and I wouldn't call myself a master of the bo-staff, but I have some skill. Now for fun I sparred with my best friends uncle, who is a master rapier duelist. (Yeah yeah, we're both star wars freeks, so we wanted to play it out). It was an interresting bout, to say the least. But having two edges to one is a very huge advantage. To answer your question darth_janus, it actually isn't too difficult to parry a thrust to the midsection. a bo-staff has a great deal more maneuverability than a singled edged weapon, and with good footwork, a thrust can be easily side-stepped and parried, accompanied with an attack from the opposite end of the staff. There would be very many thrusts involved in the duel, as my friends uncle found out. He was best to stay on the defensive (much like your Form III lightsaber style) and wait for an opportune moment to attack.
All in all, it was somewhat of a one-sided battle. But that didn't truely represent a bout between dooku and maul. Maul could only touch the middle two feet of his "bo", thus making it a little harder to attack. As far as I can tell, it does nothing to hinder the ability to block and parry, but it would slow your attacks down tremendously.
So it would be a very close battle in that sense, and I would give the upper hand to Dooku. I'm not for sure. Those are just my thoughts on the issue.