Poets Online posted its own poetry first line generator years ago at poetsonline.org/generator.html
and a second version at poetsonline.org/generator2.html
We used them as a prompt, so that a user might generate a line or two to get started.
I Ching, also known as the Book of Changes, it is one of the oldest of the Chinese classic texts.
It is a divination system for foretelling the future, somewhat comparable to Western geomancy. It is still used for that purpose in both Western cultures and modern East Asia in the same way that someone might use tarot cards.
The site's tech explanation is complex, but the best way to understand it is to just go to the site and play.
The site will gnerate "poems" of five lines each and approximately 30 words. Some poems enter a looping phase, creating much longer narratives.
After each poem generates and displays all of its words, the I'Ching interface returns, and the observer begins supplying the seeds for the next poem.
You can test drive it at http://www.levitated.net/exhibit/iching/and also see excerpts of generated poems
Thanks to Steve for sending us the site.