Actually LQ is trying to implement or going to have a tutorial section on the site. I personally am working on Slackware specific tutorials starting with a Installation and Configuration tutorial and then from there might work on others that are specific to Slack.
Personally when I try to look for other specifics for Slack, I tend to find the best from searching google..
also to add, when I find the time and out of school, I was planning on turning one of my sites into a Slack specific help site hopefully one day.