Apple has issued a firmware update for the latest MacBook Air which address issues with waking from sleep. The update which weighs in at just 1.98MB is recommended for late 2010 11- and 13-inch MacBook Air models.
MacBook Air EFI Firmware Update 2.0 - 1.98MB
This update resolves a rare issue where MacBook Air boots or wakes to a black screen or becomes unresponsive. This update is recommended for all 11-inch and 13-inch MacBook Air (late 2010) models.