Sounds about right
One thing in common: all these companies have a lot to lose if VoIP really takes off, or if someone else grabs the ball they dropped and runs with it. So it makes sense that these same companies would try to sue into oblivion the one company that is trying to make a commercial go of VoIP. So it's not about enforcing patents. It's about using those possibly invalid patents (not that this has stopped anyone in the USA from using them, or the USPTO from issuing them) to try to drive a competitor into the ground.
All business as usual in the USA then.
Somehow I think that Skype being shielded by Google makes Skype a much less attractive target for lawyers. Especially those who don't want the big guy to sit on them.


