Haha yeah, their name doesn’t turn up too many helpful google results!
Valve is the company behind Steam, SteamVR, and OpenVR. So far they haven’t built many pieces of VR hardware themselves, instead designing the system and letting other companies produce the hardware. They have however been working on “knuckles” controllers for use with SteamVR, and the images that leaked recently suggest that they have a fairly advanced set of HMD prototypes:
I’ve heard some rumors that they’ll be hosting some sort of event in the next few weeks that might be related, but I haven’t found anything verifiable yet.