Apple has released MacBook Pro EFI Firmware Update 1.3, which "fixes a display issue on 2.2/2.4 GHz 15-inch MacBook Pro models," according to the minimal text on Apple's download page. MacFixIt speculates that this update fixes a color distortion problem introduced in the earlier MacBook Pro Software Update 1.0, which is required prior to applying the latest firmware update.
Apple also released Firmware Restoration CD 1.3. This utility (a 22.5 MB download) burns a CD that can be used to start up and repair an Intel-based Mac that won't work due to an interrupted or failed firmware update. The CD won't restore a machine's firmware if a firmware update was successfully applied. Needless to say, download the utility and burn a CD before applying the MacBook Pro EFI Firmware Update.