Looking for a way to promote your new website? How about if you - and your users - stick these 5"x5" weatherproof stickers around town at cafes, clubs, and the sides of newspaper vending machines? There's enough room on them for a QR code that links to your site, as well as a quick eye-catching title and slogan. Buy them through me with BitCoins; I can even do the design for you for a little more if you'd like. They cost $2 or 1.5 Euros per sticker, with $6 or 4.5 Euros for shipping. Minimum order is 25 stickers. Other sizes are available. Full color is no problem, and these things are rugged. They'll survive rain and the elements with the printing staying on fast. They're very durable stickers made of polypropylene film, not paper.
You can buy in quantity, and mail stickers to your users around the world to promote your site in their area. If you compensate users on your site for sending you snaps of your stickers they've posted, they'll have a reason to promote your site! This is a great way to make effective advertising use out of the fact that your users are located all over the world.
You can even create referral links and share your site revenue for business generated by new users that your existing users have referred. CMS' like Drupal have a Referral module for that purpose. If you're using referral links the QR codes will vary from user to user, so you'd want your users ordering them from me. They can place an order with you, and I can send their stickers out to them directly.
The price if you don't need graphic work done is whatever the total amount comes out to, just converted into BitCoins. PM me if you're interested.