Don't know any online resources. You might be able to get some info from the people at the Madawaska Kanu Centre in Barry's Bay, ON. Try getting ahold of them through their site: owl-mkc.ca. Definately check out the Gatineau Whitewater section and (I know it's in Ontario, not Quebec) the Upper Petawawa (the section in the middle of the national park, not the Town Run) is one of the most amazing IV-IV+ runs I've ever seen. Enjoy your paddling up there. It's an amazing region for whitewater.
"The world would be a better place if everyone kayaked."-Brad Ludden (Valhalla)
"You only get one chance to run a drop blind."-DD