[SquareWheel]

And yet, I find no-www so much cleaner. With 301s it's generally not a problem, and link parsers will look for the protocol anyway. I think the only valid point is mitigating DDOS attacks, but I don't know enough about that subject to comment.

[franze]

but in marketing, as in mails and comments, you or your loyal users do not always write http:// in front of your domain.

i consulted a sh-tload of companies on this question (and yes, i also think i have better things to do), any company that chooses non-www URLs regrets it down the road.