Just to make sure we're talking about the same thing here: I mean the blue/grey phone book, not the splash screen. The list that pops up when tapping 'MyContacts2', which was installed with MyContacts automatically, or when tapping 'Phones (BETA)' in MyContacts title bar menu.
Oh, sidenote, going through Settings again, I just noticed a little typo, under Window Orientation: Lanscape
It doesn't actually work btw, even when set to Landscape the widget still autorotates. Contacts opened from the widget will open in the orientation the widget has at that moment but will not rotate after.
The ringtone-per-group only works when being called from a mobile or landline btw, not when being called via Skype or GTalk. Bug or feature?
Sorry if these things have been mentioned before, I've not read the entire thread and playing with the app and widget I just noticed them and decided to add them to this comment