BIBLE PLACES BLOG: Claim: Palace of David Discovered in the Foothills of Judah. This story is outside my area of expertise and tangential to the interests of PaleoJudaica, so I have not commented on it so far. But Todd Bolen sums up the current state of the discussion well.
Earlier posts on the numerous stories coming from Khirbet Qeiyafa can be found here and here, with many links.