Valve announced that 5000 users will be added to the official Steam beta. Check with the judge.
“Limited Beta Expansion
posted by Frank @ 02:14PM on November 21, 2012
We’re making good progress finding and fixing issues that our users have reported so we’re expanding the beta by 5000 before the long holiday (US) weekend kicks in. New limited beta testers will have an email notification in their inbox.Have a great weekend everyone!”
Still waiting for an invite? Have a go at the “hacked” version.