The response to s&box from Facepunch going open source has been "overwhelmingly positive"

Open source rocks so it's pleasing to see it go well for Facepunch with s&box. They've now added native Linux binaries for the dedicated server and game client.

GamingOnLinux
@gamingonlinux damn, at this rate we will get third-party Half-Life 3 sooner than from Valve