This is the same Caillan Davenport (probably the only Caillan Davenport in the world) that was a moderator here and the Trek Nation guy, because I found an old About Me section that talks about Caillan's study of Roman history and such. I don't know how much interest he has in Star Trek anymore or if he's willing to discuss non-Roman history subjects or his early Star Trek fandom.
da Woim hasn't been to this site in 16 years, and almost all (but one) of his posts were deleted in the Purges. It's possible that he'll get an email response if you PM him, but unlikely.
David E. Sluss is very active on Twitter, under @cynics_corner even, although
the Cynic's Corner itself has been read only since 2003. Apparently, he was still in private contact with Jammer of Jammer's Reviews as late as 2015.
I can't find anything about Lisa, the Grand High Janewayite, or Sara Rose (aka Ariel).