Well, I mean no that doesn't really help much, I mean perhaps a workaround...but a pain.
Our config is stored in the database so I can't easily move nodes up or down to set a default, and I don't see anywhere to set landscape as default.
I could change the sizing and class to be "sfIPhone4_landscape" but when the preview loads "Portrait" would still be selected right?
** THIS IS ALL OKAY THOUGH **
Just improve the UI in an upcoming release and we're good...I've already themed us out using the existing preview.