My interviews are done, my references were called, and then ... nothing?!

The interview process doesn't end the day you finish your final round, but you shouldn't have to wait TOO long to get feedback, or an answer from the company about your status. If it's been more than a few days, reach out to them to find out what's up. My guess for this person asking the question is that they came in second place and the company is waiting to see if their first choice accepts an offer.