Let's trade some coffee! We usually do a trade every 6 months or so. The idea is to buy some beans you like from a local roaster and trade them with a fellow GWJer's favorite. We usually get a group of people going and then pair people off who aren't in the same area.
For shipping, if you don't order online and ship them directly, a USPS Priority Mail Flat Rate Envelope is generally your best best. It costs a bit over $5 and takes 2-3 days to ship.