We've got some bad news, and then more bad news on top of that. That 180- to 760-day time estimate isn't the length of time it will take for your wife to get a green card -- it's the length of time the USCIS (formerly called INS) Service Center will take to approve the visa petition. That visa petition serves only to put your wife on a green card waiting list in category "2A" -- and the average wait for a green card as a 2A is about five years. It's nothing personal, the government is simply swamped with applications. These delays are a normal but horrible part of the immigration process.

In the meantime, your wife's entire stay in the U.S. is illegal now that her visa has run out. Now, she might be thinking, "Okay, I'm willing to take a chance and stay illegally during the long wait," but here's the problem. Unless you become a U.S. citizen at some point before (or soon after) her wait is over (when it's time for her to put in her portion of the application for her green card), she won't be allowed to stay in the U.S. for the rest of the green card application process -- she'll have to go to a U.S. consulate overseas. But once she's outside the U.S., a particularly harsh law kicks in -- this law says that once the consulate discovers that she has lived in the U.S. for more than a year illegally, she'll be barred from returning to the U.S. for another ten years. (And believe us, they'll make her prove exactly where she was for the last several years.) There's a waiver she can apply for (based on showing hardship to you), but it's extremely unlikely to be approved.

As you can see, this is highly complicated stuff. There's much more to know about than we can tell you here, including the possibilities of avoiding that ten-year bar on returning if Congress makes certain changes in the law, and the risks of being accused of fraud if you use a tourist visa to enter the U.S. and then get married. For much more detailed information, consult Nolo's Fiancé and Marriage Visas: A Couple's Guide to U.S. Immigration.