FAQ (http://www.steampowered.com/?area=css_b1)
When will Counter-Strike: Source beta 1 be released?
Starting later this summer, Valve will be conducting a limited-time beta of Counter-Strike: Source via Steam.
How can I get Counter-Strike: Source beta 1?
The beta will first be open to subscribers of the Valve Cyber Café Program, and then extended to owners of Counter-Strike: Condition Zero.
I am a member of the Valve Cyber Café Program, or I own Condition Zero. How will I know when Counter-Strike: Source beta 1 is available?
When the Counter-Strike: Source beta begins, it will appear in your Steam My Games list.
Can I get access to the beta if I am not part of the Valve Cyber Café Program, and do not own Condition Zero?
No.
How will Counter-Strike: Source be different from the Half-Life 1 based Counter-Strike?
CS: Source blends the intense teamplay of Counter-Strike with the advance technology of Valve’s Source engine.
What will the system requirements be for Counter-Strike: Source?
Min:
1.2 GHz Processor
256MB RAM
DirectX 7 graphics card
Windows 2000/XP/ME/98
Mouse
Keyboard
Preferred:
2.4 GHz ProcessorB 512MB RAM
DirectX 9 graphics card
Windows 2000/XP
Mouse
Keyboard
Do I get to keep Counter-Strike: Source after the beta period has ended?
No.