I have not had the opportunity to go read the rest of Paul S. Atkins's Chigo article...

[thoth_moon]

But I did find and show hcolleen the link for this:

Chigo Monogatari: Love Stories or Buddhist Sermons?

I think she focuses more on the religious themes of the chigo stories rather than the chigo themselves.  When I read the Atkins article I'm going to take notes, and once I've done that I'll happily share them here ^^