Roy Tennant has published "Remembering PACS-L" in The Digital Shift.
Here's an excerpt:
For quite a while this list was where everything new in librarianship was happening. Despite its name, topics well beyond public access computer systems were discussed and debated. It was, in a nutshell, an essential place to hear and be heard. Its like was never to be again, as since then online communication channels have burgeoned and diversified.