To participate in this year's Conlang/Concultural Card Exchange, please register using the link at the left. During registration you should have the opportunity to answer a number of questions establishing your preferences in how many cards to mail and where you're willing to mail them to. You will also have the opportunity to change your answers after registration. (While the preferences are technically part of your profile, for your privacy protection they will not display; you will only see them while editing your profile.)
For persons concerned about the cost of international mail, Carsten has looked up the cost of a postcard from Germany to the US and found it to be 1 Euro; a postcard or first-class letter from the US to Germany, according to usps.gov, is 98 cents. You can choose whether to participate internationally or just domestically when filling out your preferences. (If you want a more nuanced approach, e.g. multiple domestic exchanges and one international, please say so in the "additional comments" box.)
Another international card exchange I have been involved with sets a deadline of December 5th for sending the cards. I will stop short of making that a hard and fast deadline, and instead say that international exchanges are encouraged to mail the cards by December 5th, and domestic ones by December 15th.
Your administrator,
Amanda