I wrote a Python program to download the posts, save them locally, and let me search for keywords or specific authors. There's so much valuable information here that I wanted to have a backup in case we're away from the internet or something happens to the website.
What I have so far isn't perfect: it doesn't capture all the formatting, or the cute little smiley faces

. It has lower resolution versions of most of the attachments. I'm happy to share.
Some screenshots attached. Let me know if anyone is interested and willing to put up with my homegrown user interface.