I really only have one* and that is the ACME group. If you are not in that group and would like to be, let me know.
Someday I might have other groups, once I figure out what they should be and how best to deal with inclusion/exclusion from same.
So, want in on the ACME group so can either get an idea of what might be coming or help me conspire to fold bits of reality into more interesting shapes?
* That I publicly acknowledge. There are a few private ones that don't concern you unless you already know about them. They're more an e-mail substitute than anything.