Currently Seam does not have any WS support. However, Seam/WS is coming very soon, and will be designed to work elegantly with JBoss ESB. The philosophy of Seam is not not re-build functionality when we can instead re-use.
I'm glad to hear that :) Can you please give us a rough estimate when Seam with WS support will ship and whether it will support messaging over WS or not. Thanks in advance.