We will be releasing the dedicated server binaries later today. Tomorrow we will be releasing the client. In a couple of weeks we will make this update mandatory.
What is it:
This release is converting all users to Steam. When you install the client you will need to have a valid HL or CStrike CD-Key. Dedicated servers will need to create accounts but will NOT need to enter a cd-key. At no point will anyone have to enter credit card details. In the future there will be the option to purchase the "Platinum Pack" via Steam if you don't currently own a copy.
This release consists of:
Counter-Strike 1.6, Half-Life, TeamFortress Classic, DMC, Ricochet and Day-of-Defeat 1.0.