As always, SBo submission is closed when new Slackware release is getting close and it stayed closed for few weeks or months to give the SBo admins to test all packages to comply with the latest Slackware release.
On Slackware 14.1, there was 3 weeks difference between Slackware 14.1 release and 14.1 repository in SBo is announced. Even after the repository is announced, the submission remains closed for some time, giving more chance to fix minor problems.
Good news is that submission for Slackware 14.1 packages is now open and maintainers can update their packages or submit new SlackBuild script to the project.
Don't forget to check the Template Guidelines before submitting.