I wrote the previous post at about 1 am, without having seen any mass-media follow-up coverage. All my info on this stuff tends to come from security-oriented websites I frequent, coupled with some e-mail friends In the Business, as it were.
And yet literally, literally, the first words I hear on CNN as I come out of my shower this morning?
"The London Bombers were within DAYS of trying a dry run!!!"
EDIT: Juan Cole has a quick summary post, with links for more info on the very impressive, apparently year-long investigation, here.