How should tool developers, screen reader developers, browser vendors, search engine vendors, and other implementors interact with the WHATWG?
Feedback on a feature should be sent to whatwg@whatwg.org (but you have to join the mailing list first), or ian@hixie.ch. All feedback will receive a reply in due course. If you want feedback to be dealt with faster than “eventually”, e.g. because you are about to work on that feature and need the spec to be updated to take into account all previous feedback, let the editor know by either e-mailing him (ian@hixie.ch), or contacting him on IRC (Hixie on Freenode). Requests for priority feedback handling are handled confidentially so other implementors won’t know that you are working on that feature. Questions and requests for clarifications should be asked either on the mailing list or on IRC, in the #whatwg channel on Freenode.