We were married on August 2, 2002, and promptly jumped through the hoops. My wife was processed by the BCIS (Bureau of Citizenship and Immigratin Services ie. the new handle for the INS) for her I-551 (Conditional permanent residence) on April 22 of this year. This was done at the Denver office.
This will now allow her to travel without advance parole. (As I understand it, but always verify because you can get four different answers from four different bureaucrats in the same office on the same day.
We MUST return within 2 years to update, which means ninteen months to two years. Notice the word ---MUST---!!! At this 90 day window, you MUST file form I-751 (Petition to remove the conditions on residence) This information will be stamped on the passport, which is the temporary reciept until the updated wallet card arrives.
As I understand it, this next step can be done by mail, with lots of proof of living together, which we have done before. Send certified, with proof of receipt!
Hope that this helps.