Choices, Choices: Photoshop CS4 Standard versus Extended versus the Creative Suite Options

In the beginning, Photoshop was just Photoshop    there were no "editions" and there were no "suites." The introduction of Photoshop CS gave us a handful of "Creative Suite" options a few years back now and as of CS3 Adobe split Photoshop itself into the Standard and Extended editions. CS4 continues that pattern making the upgrade options less than simple for many of us....