Right here on the Vive website, the Vive trackers are "coming soon", but news articles about them being released are dated November last year, and I've seen people in VRChat using them. What's going on?
@AnsisMalins, What region are you in? In North America the trackers can be purchased on the accessories page. The trackers are developer only in most other regions including the EU.
Technical Specialist; San Francisco, CA