Sphere based on Smoke Ring?

I was wondering, has anyone done a sphere based on Larry Niven's Smoke Ring?
If not, it would be a great addition, with LOTS of exotic creatures and
situations.

For those who don't know, the Smoke Ring is the thickest part of a gas torus
in orbit around a neutron star.  The Ring is Earth-normal pressure, and is
breathable and temperate.  The remnant of a gas giant orbits within the Ring,
constantly losing atmosphere, replacing what is lost from the torus and the
Ring to outer space.  A Sunlike star orbits the neutron star at a distance
of 250 million kilometers, providing light and heat.  There is native life
in the Ring; puffball-like plants, floating jungles of various symbiotic
plants, all sorts of different animals, all of which fly (the Ring is always
in free fall).  Water collects from clouds into spherical "ponds" up to tens
of meters across.  Chunks of rock and metal collect and get used up by the
native life, or fall into the ponds.  In Niven's books, the Ring has been
settled for ~500 years, and a variety of cultures have sprung up, the most
powerful at the leading Lagrange point (L4).

Thoughts, anyone?