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Steam Families is here
(store.steampowered.com)
Steam is a video game digital distribution service by Valve.
Steam News | Steam Beta Client news
Useful tools:
SteamDB
SteamCharts
Issue tracker for Linux version of Steam
I don't really know how it works but according to a lot of other people here it doesn't work unless you are in the same region. This isn't the only person here saying they can't use it because they don't live near their family.