I managed to get email working on mine (sort of). Each time you get turn on ignition, you need to use the phone/settings menu - go to notifications and email, and change the value of "show X Unread items" - for example toggle between 5 and 10.
I found this tip on another forum somewhere - and if seems to be working ok. I am guessing it wont be fixed properly until we see an IOS6 patch.
Text messages are working fine for me - very cool.