As an experiment, there is now a Slack workspace at https://ietf.slack.com, which provides a persistent chat platform with ad-hoc channel creation. This platform can be used for sidebar conversations during IETF 108. To get access to the Slack workspace, please send an email requesting an invite to Christopher Wood <caw@xxxxxxxxxxxxxxx>, Richard Barnes <rlb@xxxxxx>, or Theresa Enghardt <ietf@xxxxxxxxxxxxx>.