I am having twins, and thinking about skipping infant carriers altogether. I live in the EU, where swedish seats are approved and legal. Are there any swedish seats that fit newborns well, specifically small newborns? I know many are rated down to 0kg, but that doesn't really say how they will fit newborns.
I don't know first hand, but this blog seems to say this one does: http://www.carseat.se/index.php?s=newborn
You also could ask at car-seat.org.