Is there a public beta for Steam for Linux? [closed]
Steam Beta is ONLINE!
Wiki on Installing Steam on Ubuntu
Steam Download for Linux (Updated)
Phoronix
Valve Blog (How the Beta will work)
Steam Blog with Announcement
Official Steam Linux Site
Steam Beta DEB Package
Note - It will not work if you are not registered in Steam (Non-Steam users beware!)
In addition to Luis Alvarado answer:
A workaround exists to use Steam without beta access.
steam steam://open/friends
Steams friend list will open. Via this menu you can open the main window of Steam.
Sorry to bump an old question, but the public Beta started yesterday (2012/12/20) as opposed to the private Beta that was going on prior to this week.
Either add the Steam Repo to your apt-sources and run sudo apt-get install steam_latest
or download the .deb manually and install it using dpkg.
Oh, and make sure you report any issues you run into on their GitHub page. You may also want to join Valve's steamrepo mailing list so you get updates as to when Steam needs to be updated.