In the past, Kambing never mirrors Slackware (except for the ISOs). But things changed. Now you can access Kambing to get Slackware Updates (only 12.0 and -Current are available). As you probably aware of, Kambing is one of the biggest Indonesian mirror services and it's connected to IIX networks, so it's very fast if you are accessing it from Indonesian ISPs.
Thanks to the team and i hope it's a good news for Slackware users who needed faster connection to get Slackware updates