I'm not sure that the authors of the GPL would consider themselves an "Open Source License" as compared to a "Free Software License". Still, I'm splitting hairs.
You're entirely right the iPhone is not friendly to GPLv3, but neither are all open source developers friendly to GPLv3. <shrug>
Your links as to SDK limitations were spot on accurate a year ago. Life has evolved, significantly which was part of why I piped up on this business in the first place. The momentum appears to be that things are opening up and getting more reasonable. Perfect? Heck no. Better? Yes. Getting worse? No.
Now will Apple plunk people over the head with the DMCA? Who knows. If it's going after those cracking apps, I really don't have a problem with that. Average random tinkerer on the street different story. Like I mentioned, Apple did get the music labels to drop drm. Gotta give credit where credit is due.
Does any of this detract from getting rid of the DMCA? I sure hope not. These are the times for that kind of effect to get going. That's the far more interesting conversation.