I mailed my i-751 documents (proof of bona fide marriage) to Vermont service center in Oct 2010, received a 1 yr extension a week later. My conditional 2 yr card expired in Nov 20I0. I live in Texas. Anyone knows how long it takes to receive biometrics appointment? I am starting to freak out and wondering if something is wrong. Any body out there waited this long for a biometrics letter? How long is the general time line to receive the letter for a biometrics appointment? Please help! Thanks .