Valve announces Steam Family Sharing will launch next week in limited beta form, allowing players to lend games to family and friends. Here's a bit from the FAQ: "Family Sharing is enabled in one of two ways: You can either locally enable sharing in Account Settings, with Family Sharing & Devices, or remotely respond to a user’s Steam request to share your previously installed games via email." Here's the announcement:

September 11, 2013 - Steam Family Sharing, a new service feature that allows close friends and family members to share their libraries of Steam games, is coming to Steam, a leading platform for the delivery and management of PC, Mac, and Linux games and software. The feature will become available next week, in limited beta on Steam.

Steam Family Sharing is designed for close friends and family members to play one another's Steam games while each earning their own Steam achievements and storing their own saves and application data to the Steam cloud. It's all enabled by authorizing a shared computer.

"Our customers have expressed a desire to share their digital games among friends and family members, just as current retail games, books, DVDs, and other physical media can be shared," explained Anna Sweet of Valve. "Family Sharing was created in direct response to these user requests."

Once a device is authorized, the lender's library of Steam games becomes available for others on the machine to access, download, and play. Though simultaneous usage of an account's library is not allowed, the lender may always access and play his games at any time. If he decides to start playing when a friend is borrowing one of his games, the friend will be given a few minutes to either purchase the game or quit playing.

For more information about Steam Family Sharing and the beta program, please visit http://store.steampowered.com/sharing/.