Every year it seems around this time - we see some attempt at negative disingenuous reporting regarding ebXML.  The latest outburst is from Forrester Research.  You can read a critique of their report here - http://drrw.blogspot.com/2007_01_01_drrw_archive.html  and there you will also find a clear statement on the 3 deployment models for ebXML and web services to help you decide when you need to use each as complimentary components in your solutions mix.