where, if at all, is the active online Literate Programming community

I'm already looking into the LP mailing list and the LP newsgroup, both of which may have run into technical or administrative problems.

Other mailing lists, forums, or chats?

Cheers!

Well, if one doesn't exist, I'd like to start one!

I have created Reddit/r/LitProg, after much research – including checking in with Dr Norman Ramsey, the author of Noweb and ex-moderator of the moderated discussion group comp.programming.literate and its linked mailing list LitProg. This is intended to be a revival of the existing discussion group. I would have preferred to revive the newsgroup and mailing list, but decided they are broken beyond repair. There is no telling whether there is currently enough interest to support them again again. So now we’ll find out.