Truth be told, the last Mountain Lion update did little to rectify the battery issues that plagued the Retina Macbooks. 10.8.2 unofficially brings battery life on par with the 10.7.x build of Lion. Facebook and tighter integration of contacts with other apps accompany this update the same day that io6 is available.
Also, for Retina Macbook users, the latest Office 2011 update supports the dense pixel display. Looking forward to it as I’ve ditched MS Word in favor of Pages solely because of my inability to get over the jaggy edges of Retina un-aware applications. I resort to discarding my glasses in order to remove individual pixels from my sight, which results in the harsh gradient blur of surrounding reality. I start to believe I’m capable of impossible feats, such as flying or breaking a concrete slab with a left-handed Judo chop. Thank goodness for this update. It just saved me from gross injury.