Hi, Bad form to reply to one's own posts, I know, but I've just updated babycart so it takes metadata as well comments. Also, there's better debugging info, better docs, comments are now swaddled in RFC8222 format for easier digestions by SA (including DNSBL lookup on the source IP address), there's a test suite and an updated SA config file. Oh, and PHP proof-of-concept code.
http://www.cynistar.net/~apthorpe/code/babycart/
A Wordpress patch is coming very soon...
Have fun!
-- Bob
