I finally got a chance to read through this article at lunch and its pretty good. Its basically divided into two sections. The first section is primarily fluff with special emphasis on the origin of the Githzerai (from the Githzerai perspective as opposed to the Githyanki perspective explored last issue) and Religion (like devas, githzerai are a race strongly associated to a particular power source, in this case psionic, but with a deep affinity for the Primal Spirits). As I mentioned before, I liked the Zuoken made a return to 4e as Ioun's exarch, and I also liked the sidebar that explores how individual DMs can adapt githzerai to their own campaigns. Finally, in the fluff section, there are a pair of sidebars exploring how githzerai exist in the Forgotten Realms and Eberron (a nice bit of lore for those interested in it).
The crunch section consists of two backgrounds, a bunch of racial feats (heroic, paragon, and epic), and another racial PP. Most of the feats involve increases to your ability to shift in various situations or key off the githzerai's iron mind racial power; however, there are several feats that I loved including Githzerai Blademaster (proficiency with all military heavy blades, as well as bastard swords and fullblades, plus a +2 feat bonus to damage with them that increases to +3 at paragon and +4 at epic) and Zuoken's Centering (a paragon feat that allows a githzerai monk to determine hit points and healing surges based on their Wisdom, you use Wisdom for your Strength checks, and Athletics is also based on Wisdom). The paragon path is the storvakal, a kind of psionic enlightened warrior, that is open to all classes (its powers key off your highest ability score); its powers and class features are a nice of mix of defensive and the offensive.