follow-on article from the Guardian. Coordinates are “about 25 degrees south and 101 degrees east” and a result of refinement of satellite data calculating the flight path. The depth of the area is “four and a half kilometres straight down”
http://www.theguardian.com/world/2014/apr/06/mh370-search-continues-after-black-box-ping-claim
THAT.....is deep!