Nobody who wants to help ?
Without knowing anything about your specific use case, a few quick pointers:
SOAPProcessor - exposing WS (on the buss)
SOAPClient - calling WS (e.g off the bus)
SOAPProxy - exposing existing (external) WS on the bus, i.e proxying the call
So, read the Programmers Guide (especially the WS sections), and then check the respective quickstarts.
It sounds like you should be able to just create a "simple" action chain and then do your WS stuff sequentially (if you don't want to do concurrent calls etc, then you have to do some more thinking on how to aggregate the repsonses to a single client response).