Hey, cool! I was quoted in a WSJ story today about tax-related ID theft. I'm told this link should work w/out the paywall, in case you wanted to know more about how to get an IP PIN to prevent crooks from claiming a tax return in your name.
Yes, this still happens to ~500,000 people a year. It doesn't matter if you are owed a refund or not, and most people only find out someone has already filed in their name when the victim goes to file their return and it gets rejected as already filed.