If your not one of those people then you won't have access to the beta site, not until after them anyhow. There is no date set for that I can guarantee you Jaxel doesn't know yet but your asking anyways. The only real difference here is this is crowd funded so people can try and demand answers. But not giving ETA's if he so chooses is for the same reason Xenforo's Developers don't give roadmaps or ETA's. Its unwise to do so.
Im used to CyanogenMod development timelines. The answer is ALWAYS when it is done, never a date, never a time frame. No matter who is asking or when, how often etc. Pisses everyone off, but its the smartest and safest answer.