Public outreach/Academy/RfC/User pop-up
If the participants are going to collaborate with other people, they might appreciate a quick run-down on their potential collaborators. This might be controversial, but one can imagine writing a script that summarizes the contributions of a user, e.g., fraction of articles in Main space, how many FA's they've nominated, how many edits they've made, how long they've been contributing to WP, whether they have any block history, etc.