4. The method of claim 1 , wherein the first broker service and the second broker service include a first software program executing on at least a first server, the first data source includes a second different software program executing on at least a second different server, and the second data source includes a third different software program executing on at least a third different server.
4. The method of claim 1 , wherein the first broker service and the second broker service include a first software program executing on at least a first server, the first data source includes a second different software program executing on at least a second different server, and the second data source includes a third different software program executing on at least a third different server. 5. The method of claim 4 , wherein the first broker service and the second broker service communicate with the first data source and the second data source via the Internet.