Nobody as relayed this-but the question about this did come up with GRRM at the last con. And his answer was-basically... forget about it. For now there is nothing happening and he said that HBO could loose their option (let it run out). They are still waiting for an initial script and that would probably be rejected, a new one resubmitted, etc. It sounded to me like the option was probably going to expire with nothing happening - but that is just my take on what he said when the question was asked during the reading as well as later.