The Portango-a list is the main list used by Portland hosts, instructors, and organizers for announcements of classes and events in Portland.
It is also used for various advertisers for tango-relevant events and products including out-of-area tango events.
It is also used by the Portland Tango Community for announcements that may not be tango related, but are relevant to the community, such as housing, personal businesses, etc.
Portango_d is a Portland discussion and chat list administered by Mike McCarrel. It is used for chats, ongoing discussions, or just expressions of personal opinion. Please see Mike's site for protocols or questions. It's a lively and wide-ranging forum that's highly recommended.
Tango-L is an international discussion list for Argentine Tango.