THIS IS AN EXPERIMENT ONLY AND NOT INTENDED FOR ANY PRODUCTION SITES.
Udpate:: You can now use Google Tag Manager to serve SiteCatalyst.
With that said, please feel free contribute if you like. This was a learning experience for me so any constructive critisism is welcome. It is far from complete but I seem to have gotten the image call going, including, some props and eVars. I have posted this code on github for easy sharing. You can find it here: Omniture SiteCatalyst Asynchronous Project.
I began by trying to disect the Google Analytics code which led me to Peter Coles' blog. This served as the skeleton of my attempt.
The config section is at the bottom of the s_code.js file.
You must add the namespace and tracking server information.
eVars and props are currently set in the on-page code like this