Watch out for swarming. spinningwheels has a story about when his wife had to chase the swarm down the street when it picked up and left the hive. She managed to grab a cardboard box to scoop them into when they finally settled down. I'm not sure if there was a second queen or not.
Anyway, congrats and I hope they stay happy and prosperous and don't expand their hive too much for you to handle! And that you share some of their golden bounty with the rest of us :)