I wasn't paying close attention, but the matter was discussed with one owner on MSNBC's Countdown last night (3/22) I believe (or at least sometime in the last few days on that show). Transcripts are not posted yet, but will probably be on the site later today. Search for "Long Island" inside the transcript, and I think it will take you directly to the discussion.

From what I remember, the dog is still missing, but there have been recent sightings in certain areas around the Long Island expressway (tollway?, freeway?), with the owner(s?) believing that they knew the general area where the dog was roaming.