Intro Psych Coast-to-Coast (virtual)
TIP Northwest (Des Moines, WA)
Psychology ONE Conference (Duke University)
STP's Annual Conference on Teaching (location varies by year)
National Institute on the Teaching of Psychology (Point Clear, AL)
National Psychology Summit, sponsored by Psi Beta (virtual)
The Society for the Teaching of Psychology (STP) has a wealth of resources, including ebooks, teaching activities, and more. Much of it is publicly available, but their membership is only $35 annually, and includes the journal Teaching of Psychology as well as access to their very active Facebook group.
Another Facebook group is the Hub for Intro Psych
The American Psychological Association's Introductory Psychology Initiative has a framework, along with some more concrete resources, for reimagining how we approach this course.