I'm a B2B business, and a lot of our marketing that is working is the cold-calling/emailing. We focus on small businesses so finding the right person to talk to is the most important part, its usually not the boss actually.
How persistent are you with cold-calling/emailing? If people don't respond, do you try to call them one more time?
<Sorry for the spate of questions>
Btw, love your company logo :)