A good place for conversations around diversifying readings in a particular discipline is in your professional society. Look for sections on diversity on your society's website to find conversations, bibliographies, and resources. You may also want to search your professional journals for articles on teaching diversity.
There are a lot of academics on Twitter (back in 2011, one study found that 1 in 40 academics are on Twitter), and a lot of conversations around academia happen there. Twitter can be a great place to ask questions and get a lot of quick feedback from academic colleagues around the world.
Twitter conversations are often organized by hashtags that define part of the subject or audience that you're trying to reach. They allow you to follow a conversation across many different accounts. Here are a few hashtag conversations to consider following, but know that hashtags change and pop-up quite quickly, so this is in no way comprehensive:
#AcademicTwitter : general conversations about academia
#Academics4BlackLives : accountability and grown for non-Black people
#BlackInTheIvory : exposing racism in academia
#CiteBlackWomen : challenges academics to critically reflect on their practices of citation in order to acknowledge and honor Black women's knowedge
#WomenKnowThingsToo : conversation around women in academia, business, and other domains
Twitter users can curate lists of accounts that they follow to help them organize their Twitter feed. These lists can be made public and are great for finding other Twitter accounts to follow. On any Twitter account, click the ellipses (...) to look at public lists that they have created as well as lists that they are a member of. This can be a great way to find more Twitter users on a topic.
A recent movement on social media is for people to compile readings that they would put on a syllabus about recent events. These are often done via Twitter and other social media using a hashtag #______Syllabus (for instance, #CharlestonSyllabus). This list is not meant to be exhaustive, but rather to demonstrate the breadth of topics that are covered. Searching Google or Twitter for a topic and the term "syllabus" is a good start in finding other such reading lists.
I have included credits for the work done when possible (click more... after each link).
If you know of other syllabi that you would like added to this list, please let me know!