Byline is a Google Reader client for the iPhone. The app looks nice enough, but unfortunately it offers zero granularity with respect to choosing what you want to read (i.e., your only option is "new"). No thanks.
Relatedly, Google Reader's "web app" for the iPhone is fantastic; I'm half-convinced that most of the people still clinging to NetNewsWire haven't given Google Reader a fair shake, and at this point, likely never will. The brilliance of the web app notwithstanding, why hasn't Google come out with native iPhone apps for Google Reader and Gmail?