Valve's second major living-room-gaming announcement landed today: they have produced a prototype model of their first "Steam Machine." They've made 300 units, and they'll be sending the machines to users in a very limited beta test. Valve hastens to add that this device isn't the only Steam-focused hardware: "Entertainment is not a one-size-fits-all world. We want you to be able to choose the hardware that makes sense for you, so we are working with multiple partners to bring a variety of Steam gaming machines to market during 2014, all of them running SteamOS." They haven't released specs, but they guaranteed the prototypes will ship this year. They explicitly permit using it in any way — swapping parts, changing the OS, installing any software, etc. "The specific machine we're testing is designed for users who want the most control possible over their hardware. Other boxes will optimize for size, price, quietness, or other factors."