We have no way of knowing how long ago those terrorist tapes were made, how many of the jihadis in them are already dead at the hands of Coalition forces (my guess -- about 75% of them), or how long that CD with the school plans had been in the possession of the Iraqi on whom it was found. That story is over a year old, too.
Osama, or whoever is pretending to be Osama, is trying to make us all think another big attack is coming. Doesn't mean one is.
I love Glenn Beck but I think he may be just a little overboard here. Some of ths stuff just plays into the hands of the leftists who think Beck and his ilk are doing the bidding of Bush, trying to keep us all scared like sheep so the Bush brownshirts can take away more of our liberties.