what is the latest update for Airport Express 802.11n with Mac OSX 10.6.8?
You can find out as follows:
Open Macintosh HD > Applications > Utilities > AirPort Utility
Click the AirPort Express
Click Manual Setup
Click directly on the word Version (3rd line)
If there are any updates, you will be notified.
If there are not any updates, you have already have the latest firmware.
Retrieving data ...