>>>Have to agree that 2-4-2 is the best. That is the layout on Air Canada's A330-300's and it is quite roomy for Y. Never been on a 777, but I assume they have similar cabin width?
Nope, the 777 is wider than an Airbus is wider than a 767. That´s why 777s come with 10 or 9 abreats, Airbusses with 9 or 8, and 767s with 8 or 7 - the lowernumber is of course the standard, while the higher number is used mainly by holiday airlines.
I hear there was an airline with 3-5-3 on the 747 - is this true? It would make sense, compared to the 777 which is less wide.