Google has added a section in the Google Webmaster Help forums for AMP (accelerated mobile pages) webmaster related questions. You can access the forum section over here.
The section already has 26 topics posted in it and has its very own Google presentative responding to questions.
A Googler with the forum name Tomo T. is responding to AMP related questions in that forum, with John Mueller and others.
John Mueller from Google announced the new forum section in a Google Webmaster Help thread saying:
We now have a category for AMP / Accelerated Mobile Pages here in the webmasters forum.
Forum discussion at Google Webmaster Help.