Hi, Jeff. By more serious, you mean you need detailed language exchange schedules? And I know one guy who is a college student. He really wants to improve his English and helps others learn Chinese at the same time. http://www.italki.com/T001088297.htm. Just exchange with each other your interests and prepare for a study plan. Sounds good or not?

learning a language is not always only a part time hobby sometimes,i think.Well. find the people whom are serious learning or teaching language may be depend on your luck.ok.good luck for you.By the way,mandarin is not so hard as you think.In that case,you are in shanghai now,you could chat with some people in public,that's more effective.For me,I could teach you but I'm in the other city,if you dont mind we could communicate on msn or the others chatting tools.----Friend Dennis

learning a language is not always only a part time hobby sometimes,i think.Well. find the people whom are serious learning or teaching language may be depend on your luck.ok.good luck for you.By the way,mandarin is not so hard as you think.In that case,you are in shanghai now,you could chat with some people in public,that's more effective.For me,I could teach you but I'm in the other city,if you dont mind we could communicate on msn or the others chatting tools.----Friend Dennis