Here are a couple DS Clubs that you should check out;
Dual Sport BC
Alberta Dual sport Club
For a good, cheap and long lasting DS tire you should take a look at the Kenda K270. Much more aggressive than stock type DS tires but still quite streetable. I have a set of these Kendas that I use on my XR650R for more road oriented rides.
I've heard good things about the Avon Gripsters. They are a more road oriented tire than the Kendas and a bit more expensive.