A number of employees (around 25) were laid-off from Valve recently, as per a report from Gamasutra.
Some users feared that this may affect Steam for Linux or upcoming Steam Box. Reasons for these layoffs are unknown but the good news is, Valve will not cancel any of its current projects and their Linux plans will not be affected by this.
Below is a statement issued by Gabe Newell to Engadget:
We don't usually talk about personnel matters for a number of reasons. There seems to be an unusual amount of speculation about some recent changes here, so I thought I'd take the unusual step of addressing them. No, we aren't canceling any projects. No, we aren't changing any priorities or projects we've been discussing. No, this isn't about Steam or Linux or hardware or [insert game name here]. We're not going to discuss why anyone in particular is or isn't working here.