Uh-oh. Charging $29 for the cable/adapter can only mean that the it is not a simple adapter/cable. There must be a chip in there somewhere. And that means cheap third party cables won't be available anytime soon, if ever.
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Good point. Very probable.
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To support analog line out, it seems like a pretty simple solution would be to make a connector that plugs into the lightning port and to the headphone port at the same time. in fact, I wonder if this wasn't part of the reason for moving the headphone port to the bottom. So far we haven't seen any connectors like this, but I expect they'll be coming...
Good point. Very probable.