Amazon released an update today for the Kindle 3rd Gen (Keyboard). Go here to get the information you need and the link for the download. It's very easy to update your Kindle. There are two different ways to do it. The automatic way and the manual way. I recommend doing it the automatic way.
Step 1: Turn on Kindle
Step 2: Turn on WiFi or 3G
Step 3: Click menu then 'sync and check for items'
Step 4: Wait until there are no more things being downloaded onto your Kindle (wait about 4-5 minutes)
Step 5: Turn your Kindle on hold or sleep mode (slide the power bar over; picture should appear)
Step 6: Wait for about 15 minutes
Voila! The update is done!
Manual Update - Go here for instructions.
Determine your software version: From
Home, select Menu, then Settings. On the Settings screen you will see
the Kindle version at the bottom of the screen. If you see
"Version Kindle 3.1" or earlier (3.1.2, 3.0.3, 3.0.2, 3.0.1, or
3.0), please proceed with the steps below to update your Kindle
Keyboard to the latest software.
This update is number 3.3.
Something go wrong? FAQs and Troubleshooting here.