Time will tell (Score 1)

I don't know that much about the legal soundness of the GPL but what appears to be legally sound and what actually washes out in court are frequently two different things. It is not uncommon for the US Forest Service to ask someone to sue them to find out exactly what the results of a new law or regulation will be. Laws can seem sound when you read them but until they are tested in court there will always be a possibility that the end result will not be what you intended. I for one hope that there is no need for it to be challenged in court but with more $$$ appearing in the Linux world the likelihood seems pretty good that it will be challenged some day.