Not a new question; but I am interested in
comments on the following.

From http://www.gardfoods.com/coffee/coffee.coffee.htm:

  "Coffee beans were chewed raw for centuries in Ethiopia and Yemen.
  Excavations in the Ethiopian highlands where coffee grows wild indicates
  human gathers have been eating coffee berries over a 100,000 years. The
  content. Being sweet, being nutritious, and seeds being in 100,000 year old
  human faeces supports this theory."