this came up when Mike Hearn shared his satoshi e-mails too! The Ripple that is being referred to here is far removed from the shitcoin that we know today, it refers to a sourceforge webpage from 2006.

i did some digging here's an archive of it:

https://web.archive.org/web/20050205061236/http://ripple.sourceforge.net/

reference: https://bitcointalk.org/index.php?topic=2080206.msg20794050#msg20794050