Still testing, the upgrade to IOS6 also has an option to block the notifications on screen for SMS and by default is blocked. This AM SMS did not go through, will see now by allowing notification on screen. Did not get any email while driving.
I am guessing email/SMS notification on iDrive does not require the iphone to be connected through cable to the iDrive, and hope will still work while connected.
2012 Eurocup: "Espaņa"
2012 650i Convertible/Alpine white/Vermilion Red Nappa Leather/Fine Line Oak Wood Trim/Drive Assistance Package/Premium Sound Package/20" Light-Alloy Wheels V-spoke (Style 356) with performance tires/Increased top speed limiter/Luxury Seating Package/BMW Apps
2008 BMW M6 convertible/Alpine White/Indianapolis Red leather
2003 BMW Z4 3.0/Sterling Gray/Black interior