XMLSec support in PHP

I use libxml2 in PHP as almost a daily task, and I love it, but as my company is going further and further into XML as a data transport/storage format, I've become piqued at the idea of actually using xmlsec to securely store and/or transfer our files and RPC data. I know that there is an xmlsec project (http://www.aleksey.com/xmlsec/) which is building off of or related to both libxml2 and OpenSSL, so I was curious if anyone had started work to expose xmlsec functionality to PHP. I know the xmlsec project listed above is fairly early on in its development, but if someone knew of a proof of concept implementation of xmlsec in PHP, I'd love to play with it. If there isn't, has anyone started such a project, or are planning to? Just curious. Thanks! Mark J. Hershenson markhers@green-ant.com http://green-ant.com/