I scored some Callebaut dark chocolate at "Good News", a really cool kitchen supply store in San Diego. You should be able to find it at Whole Foods as well. http://www.callebaut.com/
I was going to use it in some cookies for work. But, I ate the whole half-pound block that night by myself.
They never made it out of the house. Ever eat something so delicious, you get emotional?
For dutch process chocolate powder, try Penzey's version... But, if you go to their store and don't check out the rest of their selection....what's wrong with you?
There are retail stores in large metro areas across the US. Fortunately, the one in Seattle, near Pikes Place Market opened before I got here. Or, they have excellent mail order. http://www.penzeys.com/