I knew about these before, but needed to look up the list again today. Apparently I hadn't bookmarked it. This one includes all the available flags in Skype. Note that some of the hidden emoticons are PG.
Sheryl Nussbaum-Beach starts with how Skype is a disruptive technology, explaining conversations with Al Upton (miniLegends' teacher). She transitions into what it means to be a teacher leader in the 21st century and mentions research on the long-term learning benefits of innovative teaching.
These are the roles of a 21st Century educator: Teacher as leader, Teacher as writer, Teachers as 21st Century literacy activist.