Oh snap. That's identity theft. You're going to need to monitor all three of your credit reports and have fraud alerts put on them. If they have enough of your information to open one card, they can open others.

I use Transunion's "True Credit" service to monitor mine. You can look at your reports and scores any time and they send alerts to your e-mail or phone as soon as anything changes or a new account is opened. I really like the service. I changed my address with my bank and credit cards about 2 weeks ago and had an alert in my e-mail within two days.