Currently all standup configuration (creation, adding participants, etc.) needs to be done within the StandupWizard dashboard, however we're working on adding Slack commands to make working within Slack more useful.
Currently standups run on the schedule that was set no matter the circumstance. This is not always useful for scenarios where a standup participant is out-of-office, or the standup as a whole shouldn't run for a day or period of time for any variety of reasons.