See AnnouncementsForTheConferenceProceedings.
As somebody cleverly points out, GraphicalToolsCanCompressSoMuchInformation. Therefore, take a picture of your session (this will show attending people) and upload schemas/graphics that give a graphical clue of what was going on and link it to your session's page.
See also the complete list of IssuesAndOpportunities posted for discussion in OpenSpaceTechnology meeting format.