After configuring my iPhone app for unit testing, I belatedly noticed this warning in the documentation:
iPhone OS Unit Testing Support: Unit tests are not supported for iPhone applications.
As some of the other Xcode documentation regarding unit testing is out of date...is this still the case?
OCUnit unit testing seems to be available in 3.0 and later according to this page
That said, I use GHUnit and like it a good bit better (and it definitely supports iPhone). The GUI is great: