Buy from FM allows songs played from FM radio stations to be purchased from the Marketplace. Wireless hotspot access added for automatically updating the user's collection, browsing the Marketplace, refreshing Channels, exchanging favorites with friends, or buying songs tagged from the device's FM radio. Zune Channels, custom programming stations that deliver personalized playlists to Zune from a variety of sources the user selects (such as music experts, celebrities, or top radio stations), is added. Clock and free games are added, with Texas Hold'em and Hexic provided in update.
The games are pretty cool, definitely a nice update.