Thanks for the responses everyone

Global Guy: Is the 355 timeline true for ALL airlines and seats though? Or just the earliest any release?

illico & mikeyyz: that would explain why I was only seeing UA options - duh on my part. mikeyyz: I checked out your first class reviews - SQ the holy grail of F awards - wow! I'll check out Asiana or maybe try to visit Singapore instead of Tokyo - is it possible to get Singapore F awards at all, on any of their planes / routes from North America to Singapore or are they all blocked?