Thanks swtblcn23 and everyone else on here. Our interview was this morning and I was approved!
We arrived 40 minutes early and were out of the building within a half hour, nice and speedy. Ladies, go light on the accessories because you have to take them off to go through the metal detector, men same thing with belts. And be prepared to pull your pant legs up to show the tops of your boots! The Dallas office hands out pagers and we only had to wait for 10 minutes before ours went off.
The interview was short and sweet. The IO asked very few questions. Had we been married before? Do we have any kids? When did I last enter the US? What documentation did I show at the border? Then he had me confirm my full name, birth date, address and cell number. He wanted to see the originals of our birth certificates and marriage certificate, passports, social security cards and driver's licenses, and copies of our joint bills. He took 4 photos from an album I'd put together and that was it! Then the IO said, "I'm going to approve you today and you should receive your card in the mail in 3 weeks." He added the disclaimer about the green card being conditional and told me not to leave the US until I had the card in hand.
Good luck to everyone still waiting!