Have you considered dim sum for brunch in Flushing (i.e. Gum Fung)?
Or you could check out one of the many brunch spots along Bell Blvd. in Bayside (i.e. Bourbon Street).
As for Whitestone, I wish I knew of a good brunch spot. I honestly can't think of anything (other than good bagels and regular ol' diners).
Good luck, and welcome to Queens!