Mine is working fine...go into calendar and make sure all of the calendars you want to use are actually clicked. I know that when I added beta 6, it turned off my enterprise work calendar for some reason.
And again, to double check, you've made sure these events are scheduled for today? Are they all-day events? Because those do not show in the NC today view.
If the events are scheduled for today, and are not all day events, try rebooting your phone.