My company develops servers that provide internet access to nomadic users (like in a Hotel environment). In order to load-test the server, a unique MAC address has to be used for each connection so a single server creating lots of data requests wont work.

Our current test procedures allow us to load-test with a small number of clients, and we're investigating the feasibility of out-sourcing these load-tests to a company that can perform load-tests with thousands of client connections.

Does anyone have any experience with companies that provide these types of testing services? Any ideas of where to look for such a service?