Direct link to donations page - http://www.openbsdfoundation.org/donations.html

This is very much a good cause - the BSDs tend to get forgotten behind the rush of Linux development, but they take their time and produce some excellent ideas and products (thinking of: PF, OpenSSH, amongst others) - why not take 5 minutes and donate the cost of this week's coffees to the project, and see what else they can produce in the long term.