I'm just a little suspicious about the story. All of the articles I've found so far appear to be based on the same initial release plus there does not appear to be anything on the news wires or BBC. But if it does turn out to be true I'm looking forward to seeing pictures of the resultant crater and nearby terrain. Patrick Chuck Hards wrote:
Incredible timing. Just an hour before I checked my email and found Patrick's post, I read in the June S&T, page 38: "Some astronomers predict that there is about a 30% chance of a Tunguska-sized airburst occurring somewhere on earth during the 21st century". While this impact (not an airburst apparently) appears to be much, much smaller than the Tunguska event, it still serves as a reminder of just how vulnerable we are on this pale, blue dot.
Here's where the google search will direct you: