From the 1.7 release notes:
Experimental Features
In addition to "Yesterday", "Today" and "Tomorrow" you can have date cells show the time. Since this feature is still experimental there isn't a preference interface for it yet, but here are some commands you can enter into Terminal to adjust the built-in settings:
Code:
defaults write com.omnigroup.OmniFocus RelativeDateFormatterShowTime YES
defaults write com.omnigroup.OmniFocus RelativeDateFormatterDefaultWantsTruncatedTime YES
defaults write com.omnigroup.OmniFocus RelativeDateFormatterUseRelativeDayNames YES
defaults write com.omnigroup.OmniFocus RelativeDateFormatterDateFormatStyle medium
The first line alone is sufficient for your request, but adding the second will get you a more compact format.