I'm just asking for ideas for merchandise to take to events - not for sale.
How about QR Cubes?
Generate them here.....
http://www.recursion.co.uk/Cairns/cube_form3.html
with links to Wiki-things? Mini-pedias?
You will need a Bookleteer account to find out more and download the QR Cubes. Or I can send them.
http://www.facebook.com/#!/pages/bookleteer/132921553391609
Gordo