The Slackware maintainers are busy at work. There's been a lot of activity and a lot of changes have been coming down the pipe for slackware-current. Couple of days ago, the file /etc/slackware-version was changed. The version was 13.1, but now it's 13.37. I think that's a leet-speak joke.
It's been almost 10 months since Slackware had it's last release (13.1 on 24th May 2010). It's getting close to a time when a new release might be coming out. I would have thought release 14.0 would be it, but maybe they are going to settle on 13.37 for the cool effect.