Fire up Software Update and get ready for some downloadin'. OS X 10.6.1 is here. Check out Apple's information about the latest update below:

The 10.6.1 Update is recommended for all users running Mac OS X Snow Leopard and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac, including fixes for:

•    compatibility with some Sierra Wireless 3G modems
•    an issue that might cause DVD playback to stop unexpectedly
•    some printer compatibility drivers not appearing properly in the add printer browser
•    an issue that might make it difficult to remove an item from the Dock
•    instances where automatic account setup in Mail might not work
•    an issue where pressing cmd-opt-t in Mail brings up the special characters menu instead of moving a message
•    Motion 4 becoming unresponsive

For detailed information on this update, please visit this website: http://support.apple.com/kb/HT3810.
For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222.