We're not talking about Cuba. We're talking about the US. By your logic you could argue that if he was in Iran and just stepped out on his front porch and said the government sucked he'd be executed. Yes, that's probably true, but that's Iran, not the US.
No, he's not being punished. His domain name has basically been seized the feds have leaned on Visa, Mastercard and Paypal to suspend his funds, they've leaned on Amazon to pull his web hosting and they're leaning on Twitter and Facebook to pull his accounts. But he's not being punished. Oh, and we have potential 2012 Presidential candidates calling for his execution (which is apparently OK to do). But he's not being punished.
If Assange has committed a crime, then freaking charge him with one. Heck, just publicly come out and say you're going to charge him with a crime. Accuse him of a crime if he's committed one. That's all I'm saying.
Let's say for the sake of argument that the guy has committed a crime. Heck, let's say he's even committed a crime that is worthy of execution. Is it too much to ask that he actually be accused/charged with said crime before they drop the hammer on him? Is that really asking too much?
Again, accuse the site and it's owners of espionage then. Go to court. File the appropriate paperwork. Let the site owners respond. Let a judge and/or jury decide if the site is really participating in espionage or if the feds are simply over reacting and go from there. It's a little thing called due process. Fifth Ammendment much?