Are you sure that Weldon has implicated Gorelick's wall, or is that a surmise based on all the discussion by bloggers?
That said, SOCOM is out of its league when dealing with counterterrorism investigations. It may have the mission and assets to hunt down and kill terrorists in the field, but it is not their mission to conduct CT at a strategic level or from a homeland security perspective. SOCOM attorneys may have felt that there were legal problems in coordinating with the FBI (ignorance of what EO 12333 authorizes, misreading of the "wall", misapplication of Posse Comitatus), but that's because they don't normally coordinate with the FBI. However, lawyers at the Army INSCOM, Department of the Army, and DIA levels are very familiar with how to share information with the FBI. Pentagon lawyers familiar with CT and espionage investigations have FBI intelligence officials on their speed-dial. As a former colleague pointed out the other day, Army intel would have gotten material relating to the Atta group in Brooklyn off their desk and into FBI hands immediately.
So all I am saying, if what I read above is accurate, then perhaps Gorelick cannot be pinned down to take some sort of direct blame on this particular issue. That does not imply I think Gorelick and Reno should not be hauling around a heavy black ball at the end of a chain attached to their ankles.