IMO, it is not the wire taps in and of themselves that are causing the Dems heartburn. It is programs like Able Danger that can take this data and sift through the degrees of separation that isolate the bad guys from MSM types, Democrats or their supporters. The translation of the hundreds of thousands of Iraqi Defense Ministry document most certainly has identified more US and European contacts that can be matrixed into existing open source programs. More Democrat/MSM heartburn.
Couple this with the OFF revelations and you have the makings of a Democrat scandal of epic proportions.
The only question that remains is whether or not the Pubbies have the balls to finish this off. I fear we already have the answer to that.
I think that certain of the republican congresscreatures have the stones to try to make a difference. However, too many of them are just as dirty and complicit as the dems. And W himself may find that there are a few boats that he dare not rock.