Kumamoto-i (the mailing list) and Kumamoto International (the Facebook page) have diverged into separate venues. In the past, messages posted on the mailing list were automatically fed into this Facebook page. However, since YahooGroups has abandoned RSS, that function was lost. If you are looking for information about Kumamoto, be sure to check out both venues. By the way, I think Kumamoto-i is particularly good for buy-and-sell transactions between participants.
http://groups.yahoo.com/neo/groups/kumamoto-i/conversations/messages