Apple has posted a few software and firmware updates, which address issues with airport not able to turn off or on, and drive noise with optical drives. The updates should be available through Software Update, so be sure to check there.
This update fixes a problem we reported on a little while ago where people were unable to turn off airport if it was on, or turn it on if it was off. This affected Snow Leopard users, and while some workarounds helped a few people, this update is needed to fully address the issue.
This update also fixes problems with network loss when using "Wake on Demand" features, and the inability to create computer-to-computer networks and share internet connections. The update is 12.95MB in size.
This update is for MacBook Pro 5,1 and 5,2 computers (Late 2008, Early 2009 MacBook Pros) and addresses an issue where the optical drive makes noise when waking from sleep or starting up.
Be sure to apply the SuperDrive Firmware Update 3.0 (below) after installing this update.
This update is for MacBook 5,1 and 5,2 computers (Early and Mid 2009) and addresses the optical drive noises in these non-pro systems. As with the MacBook Pro update, this will require you to install the SuperDrive Firmware Update 3.0 after installing. I wonder who the mysterious person "Glenno" is, who is mentioned in the KB article about this firmware update.
This updates the drive's firmware to address the noise issue, as long as the computer's firmware is of the appropriate version. The update requires OS 10.5.7 or later, and is 18.35MB in size. More information on the update and how to apply it can be found here: http://support.apple.com/kb/HT3744