Okay, about the down blanket!
I have one of these, in black: The Eddie Bauer Down Travel Throw & Pillow Set.
I can't figure out how to link directly to that item b/c of their website code but look on this page and you'll see it there:
http://www.eddiebauer.com/EB/Bedding...rows/index.cat
It's lovely... the blanket folds up into the case and the case is a perfect pillow. Or, you can take the blanket out and use it as a blanket and stuff an airline pillow into the case. It packs up very, very flat. It also has a velcro loop you can tie around your suitcase handle.
I don't carry this every time, but if I think I want to sleep and have room for it, its wonderful.