An update to the Steam client has just been released. Steam will update itself automatically when you restart. Here is a list of the changes:
STEAM CLIENT CHANGES / ADDITIONS:
Removed Exit & Logout command
Improved authentication system
Improved UI feedback when Internet connection has been lost
Improved pre-loading behavior (will no longer pause)
Added new in-game languages: Japanese, Thai, & Russian
This update includes a "Half-Life 2 Hardware Survey". This mostly automated survey collects information about Steam users' computer hardware (and some software). We plan to use this information to tune the performance of our games.