How do I go about putting my avatar on the discourse.org/users/ page?
You’ll see whatever Gravatar is serving. We aren’t doing any caching ourselves. I find that it can take a while for Gravatar to start serving my new avatars.
This post is now out of date. See Avatar Subsystem redesign
Although it’s a cached gravatar which you need to manually refresh in each discourse site if you want them up to date after changing to a new gravatar - unlike most of other gravatar sites, which probably have no cache but at least update instantly.