http://www.wayn.com you can meet a lot of fellow travelers based on origin and current location. it's not specific to traders but it's good stuff. ps if they ask you for your email password so to import your contacts, just choose "skip this step" if you don't like the idea.. don't worry about it the site is legit PS i'm not affiliated all the best 50
Another favorite is http://www.meetup.com/ Just don't join the "I Just Got Out of Jail Club" (Albuquerque, NM) P.S. Pierre Omidyar, the Founder and Chairman of eBay, is one of meetup's board of directors.