QUOTE(0xdeadbeef @ Feb 13 2008, 09:51 PM)

I filed N-400 (I obtained it through marriage to USC), and my FP is in 2 days. My intention is to petition for my parents immediately, something that should be fairly straight forward. Now, I am wondering what to do about my little sister, who is 14 yrs. old. When I bring in my parents, would she be automatically in as well, or I would need to petition her as unmarried sibling of USC, or wait until my parents become USC so they can petition her?
Parents are immediate relatives, a petitioning category which does
not allow derivatives to accompany or follow to join. Separate petitions are needed to bring their relatives.
So, unfortunately, your little sister will need to be petitioned for separately as the brother/sister of a USC after you naturalize and/or as the minor child of a permanent resident after one of your parents enters the U.S. with an immigrant visa. Both categories have waiting lists, you need to check the Dept. of State's monthly visa bulletin to determine how long the wait currently is.