"There is no reason for them to hold off filing a ton of actions against other potential defendants unless they are waiting for judicial confirmation of the validity of EDIG's patents with which to steamroll the future defendants."

This makes sense to me, especially since these trials can take years to settle. Even the Markman, which we're all waiting for, is just a preliminary stage in a process that could drag on for some time afterward. Why not use this Markman as an opportunity to fine tune their strategy while at the same time building their war chest (and their credibility) with "nuisance settlements" and serving notice to the big infringers that their day--in court--will come.