i have no idea why Valve posting this in their website. its concern to small group and they probably posting it to promote their lame project. CS:S beta suppose to release to the millions of CS current customers. very lame marketing and big shame. anyway if they want to post it they can post it in their cybercafe members and stop acting lame and posting stuff which not concern to almost nobody *rofl*

You still need a Steam account to play though.. that sucks

Just do a search for CS or Source or something. Its there.