I think a UK trading thread would be a good idea, I'm a bit uncomfy about people here knowing my Facebook profile and stuff. As nice as it would be to trade with people in other countries it would start getting expensive just sending one card so many times, I might trade with other European countries at a push...
What would be the easiest way to send the cards do you think, just chuck them in an envelope with a regular 1st class stamp or pay the extra to get recorded delivery? I'll probably go with recorded delivery so I know that the cards have been received and I'd have proof of postage if someone tried to stir up problems :3