Update

The weirdest thing happened. The mail came twice today. I saw him pull up and deliver mail about noon then another guy came and delivered some more mail about 3:00. I'm not sure I've ever gotten mail twice in one day. Not suprisingly, the I-171H was not in either batch. But wait, there's good news! After 4 attempts this afternoon, I actually spoke to a human being at the Cincinnati USCIS office and she said we were approved on January 11th and she thinks the I-171H was mailed out yesterday. Woohoo! So maybe just a day or two more of stalking the mailman...for now.