OmniFocus for Mac can create custom views of your database (called "Perspectives"); if you check the forum for that edition of the app, there are a couple of threads that show how to make a perspective like the one you're looking for.
Once you've got the perspective set up, you can go into OmniFocus for iPhone's settings screen and turn the Perspectives feature on. (Scroll to the bottom.) That feature adds a new top-level item to the app's home screen, and next time you sync your iPhone with the Mac, the Today view will appear there.
(If you don't have the Mac app, email our
support ninjas and mention this thread in your email; I can lend a hand.)