I listened to the Richard Smith interview on 610
He described in some detail about how they are setup.
It's designed to be a vanilla "look" where every time the quarterback lines up and reads the defense it looks the same. There are two safeties over the top (no SS, no FS) big athletic corners are in press dedicated to a specific side (not dedicated to specific receivers) LB's are in the same neutral position (no Sam, no Will) and the four down linemen are as we've seen them, rotating.
now all of that info wasn't in the interview. i'm paraphrasing from the discussions and observations we've had recently in TC's thread: http://texanstalk.com/forums/showthread.php?t=49255
but i think we're narrowing in on what Smiths Defense is supposed to look like.