Updated with the actual information about the Dashboard Update 2.0.15574.0! System Software Changes/Other Avatar Store added to social on the Dashboard Updates to the Avatar Store Adds "Manage Exercise Info" to players Profile Adds the option to select or remove TV providers in settings > TV Adds the option to turn off Ratings Collection Sound in settings > Console Settings > Audio Disables support for unlicensed 3rd-party wireless controllers (e.g. Datel Wildfire Evo). Bing Pic in Bing Search switch now (Germany) Xbox Live Changes Improvements and preparation for future Xbox live Enhancements Unpublished Changes: CB has Changed RC4 Keystream Calc Has Changed ("Salt" added to process block) Source: http://en.wikipedia.org/wiki/Xbox_360_system_software
Yeah, it's also newer than the one released last week, most likely fixes the wheel feedback issues people were experiencing. Ver. 2.0.15574.0
Oh, I noticed one strangely nice thing about the profile, they added Exercise Info which consists adding information about how much you weight, height, and etc. Edit: Added all info about the dashboard update, Wiki's quite good sometimes.