驚喜的發現:我的綠卡可能已經被批準了

今天查I-485的status,看到如下信息:
Current Status: Notice mailed welcoming the new permanent resident.

On August 14, 2007, we mailed you a notice that we had registered this customer's new permanent resident status. Please follow any instructions on the notice. Your new permanent resident card should be mailed within 60 days following this registration or after you complete any ADIT processing referred to in the welcome notice, whichever is later. If you move before you get your new card call customer service. You can also receive automatic e-mail updates as we process your case. Just follow the link below to register.

好象我還要做些ADIT啥的才能最後拿到綠卡,誰能告訴我下一步我該幹點啥?