I would guess there are quite a few more plans in the pipeline around the apparent target date of 22nd August that seems to have been bandied around quite a bit even as far as the WSJ.
It does seem to show a lack of imagination going for planes again in the style of the old bajonka plot of Ramsey Yusef a few years ago. (spelling probably wrong)
I gues there might be a few people who still think this is all a CIA/neocon/Bush-Cheney/etc. plot or that we should be paying more attention to the road toll and welfare cheats.