Acegi Security with CXF

Does anyone have an example of authenticating with Acegi Security using a
Simple Server?

I'd like to pass the authentication token as easily and securely as
possible -
http://www.vorburger.ch/blog1/2006/10/propagating-acegis-security-context-in.html
 suggests passing it in the SOAP headers. There is an example at that URL
as well but it is for XFire and I'm not sure how those concepts translate
over to CXF; additionally the example they use points out its own
inefficiency suggesting it should use a custom handler to read the contents
of the SOAP message via StAX.

Regards,
Kaleb