As mentioned above, most of the information about divert sockets can be found on the Divert Sockets for Linux website http://www.anr.mcnc.org/~divert.
There is also a mailing list, whose archive can be found at the website. To join the mailing list send email with an empty subject and the following line in the body:
to email@example.com. The list address is firstname.lastname@example.org.
To unsubscribe, send mail to email@example.com with an empty subject and the following line in the body: