What about a service that lets you post to every barter site at the same time, not just craigslist. Has that been tried? If you could get people to use it (thro

What about a service that lets you post to every barter site at the same time, not just craigslist. Has that been tried? If you could get people to use it (through better UI and more exposure for what they're selling) you could break craigslist's hold on the marketplace.