This IDC Flash describes IBM's October 7, 2008, announcements introducing new models in the IBM Power System product line. IBM introduced a new model, the IBM Power 560 Express, and new options for the IBM Power 570, as well as new "i" editions of the Power 520 Express and Power 550 Express models that run the IBM "i" operating system. This document explores the avenues of competition in the Unix server marketplace and how this announcement could impact market dynamics.