Assign team member's avatar to a node
When working in teams, it would be good to be able to assign a team member to a task, i.e. by adding the team's member avatar to the node to show who is working on what.... like they do it in Trello
Having said that, rather than having a whole team and team members model implemented, having a way to generally tag a node with a small picture would be really useful. When editing the map, one can then simply choose a team member's mugshot for instance.
Milos Prederes commented
Trello is a world wide used and popular task management system and it should be even more perfect with a connection between Trello and Mindmup.