"Holodeck", an open source version of ebXML Messaging V3 (http://docs.oasis-open.org/ebxml-msg/ebms/v3.0/core/os/ebms_core-3.0-spec-os.pdf ) and its AS4 profile (http://www.oasis-open.org/apps/org/workgroup/ebxml-msg-as4/document.php?...) is now available on Sourceforge at http://holodeck-b2b.sourceforge.net/,  with main on-line documentation page directly accessible at: http://holodeck-b2b.sourceforge.net/docs/