The ebCore TC is about to release a new specification for public review:  

"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/

Webswell Business Hub 3 is an ideal solution for heterogeneous groups of companies or company units that need to interchange business information with each other. It is possible to interconnect virtually anyone to anyone, regardless the supported protocol or technology - the Business Hub implements ebXML, Web Services and AS2 standards and EDI or XML data formats.

Quorum Information Technologies Inc. announced today that it has completed the 11 integration points between
GM's Parts Workbench and XSELLERATOR,
Quorum's  dealership management system (DMS). Each one
of these integration points saves dealerships time and improves their
ability to service their customers, further adding to the Quorum DMS
value equation. GM's Parts Workbench is replacing the GM RAPID system
for parts ordering.

The CEN workshop on Cyber Identity has a document out for review that references ebXML extensively. In particular the conventions for party identification developed in the CPA Tc.