If you had not created this topic I would have tonight as we can't not have a George Martin topic, he is such a good fantasy writer after all
As for your question there is no current date. Any date you read is not accurate or an educated guess. George has not finished writing the book. It might only take him another few weeks or it could be months yet. To be kept up to date with the situation I recommend you read GRRM offical web site which can be found http://www.georgerrmartin.com/
I recently got the audio book of A Game of Thrones and its the unabridged version which is 39 hours
I have not listened to it yet, maybe when I go travelling and am bored on a bus but don't have room to carry books.