My friend Brent Barton reminded me of another way to put learning into action across the organization. When your team holds an iteration retrospective, invite a coach or scrum master from another team to lead the retro. This has two benefits:
1) The coach/scrum master for the team ending their iteration can participate in the retrospective; his or her part of the story will be included in the data gathering and analysis.
2) The coach/scrum master who is leading the retrospective gets to hear the issues and analysis and will be able to take information back to his or her team.