This is pre-history but there isn't a pre-history subforum so I'll put it here.
Update from Little Salt Spring in Florida. The latest discoveries are discussed in this TV news report, showing my bro-in-law and his band of diving students. The most exciting artifact found recently is a 10,000 year old spear.
http://www2.tbo.com/video/2011/mar/1...30/video-news/