I was at DEFCON 19 in Las Vegas, Nevada last week, with Finnix stickers and CDs in tow. And I gave away a lot of stickers, approximately 150. Enough that when I got back, I heard from multiple people who had been at the conference and saw other people who had Finnix stickers on their bag, laptop, etc.
Of course, you can also receive free Finnix stickers through a variety of methods. The self-addressed stamped envelope (SASE) method has been pretty successful since I launched it earlier this year, and I send out SASE stickers a few times per month. Monetary donations help support Finnix and will also receive free stickers as a thank you.