I just re-read the post and took note of the date. But my previous sentiments stand. Harris hawks are smart. You man your birds to the highest degree. And craigslist is a good place to get attention.
If I had to guess at this point I wouldn't be at all suprised if someone living in the countryside had adopted him by now. If he got vocal and you offered a "no questions asked" reward you may well get a phonecall.
Again, good luck!