This just went out on stan-users and stan-announce, and will shortly go out on the blog:
As we announced here a few weeks ago, the first Stan conference will be Saturday, January 21, 2017 at Columbia University in New York. We are now accepting both conference registrations and submissions. Full details are available at StanCon page on the Stan website. If you have any questions please let us know and we hope to see you in NYC this January!
Here are the links for registration and submissions:
Registration
Anyone using or interested in Stan is welcome to register for the conference. To register for StanCon please visit the StanCon registration page.
Submissions
StanCon’s version of conference proceedings will be a collection of contributed talks based on interactive, self-contained notebooks (e.g., knitr, R Markdown, Jupyter, etc.). Submissions will be peer reviewed by the StanCon organizers and all accepted notebooks will be published in an official StanCon repository. If your submission is accepted we may also ask you to present during one of the StanCon sessions.
For details on submissions please visit the StanCon submissions page.