I'm also not looking for business directories that lists importers/exporters.
I'm looking for a social networking site where different companies of a particular industry - Retailers,Suppliers,Manufacturers,Customers etc can connect with each other. They can find vendors offering supplies in a given location or in given price range. Basically a mix of social network, supply chain management, and CRM.
Do you know any such service? If not, will it be a good idea for startup? Should it be generic or focussed on a particular industry e.g. import/export or electronics ?