Baron Captain?, at the moment bush operators (ones that use floats) are getting ready for the winter. Most hibernate and open up shop around April so you won't see any jobs open up til then. Also, bush operators do not usually advertise for pilots. Pilots up here looking for a bush flying job take a road trip and visit the various operators to chat and hand in their CVs. Some pilots start out as dockhands for a little while then get a job flying. There are some that operate year round as they have skis, fly from big lakes up north that don't freeze, or use chainsaws to carve out a runway on the frozen lake.
As for the amount of float time, your total time seems ok and I've heard quite a few of them require as little as 25 hours on floats and some, like SpiralDive has said require 100 hours.
You can also try:
http://www.harvair.mb.ca/forum/ http://www.aviationspot.com/bbs/
Good luck!
Cheers