Weâre still working on it, but most folks shouldnât consider it some panacea that theyâre waiting on â in most cases, the only way to scale usage of the API is going to be through access tokens and per-user rate limits.
Once this feature is ready weâll announce which API methods application-only auth is allowed on as well as the rate limits allowed for these kinds of requests per method. The limits will be application-wide per window and will not subdivide per IP address or in any other way.
In the meantime, you can use a single access token and OAuth 1.0A to emulate much of this future behavior â the limits wonât likely be all that different for what can be done with application auth versus a single-user access token.