I like it! Probably needs some categorization, b/c it's hard to control whether people will barter sewing for cheeseburgers or C for javascript, etc. But a great start, keep going.
It would also be nice to be able to search both ways. Right now searching only shows what the other person is offering, but it might be nice to search by what they want. That way you can search by the skills you have to see what you can get for them.