Aw, that makes me sad. I've been telling myself I'm going to get into the VR scene and dive in with Oculus. I was hoping it would be a dev-friendly environment.
I've heard (and experienced) great things about Unreal Engine 4 with HTC Vive. I have a couple friends using it for an independent study at Uni. It's great fun, and the Vive and its controllers are honestly excellent pieces of hardware.