I'll toss in another question if I may (thread title seems generic enough to piggy-back).

I'm a Permanent Resident who is going through the naturalization process. Is it ok to sign up for GE and then subsequently naturalize (or will this somehow invalidate the data that GE have, e.g. my new US passport number)?

I want to get GE done quickly so I can get it reimbursed on my AMEX Platinum before canceling the card.