Hi there,
An interesting and compelling subject, that might not be as obscure as you may think.
Looking back, I actually encountered a site, seemingly based upon a well crafted character, which explored the aspects of her life as a genie - as well as the events pertaining to her "djinnification". There were also a number of other arts regarding sometimes oblivious or resistant young woman becoming genies as they are bonded with their respective lamps or bottles - a theme not far removed from the symbiote bonding or evil conversion enclaves of TF art, as the case was.
Unfortunately, I am not sure if the site still exists - considering my encounters were back in 2007/08 - but it does reflect that the idea, only a few years ago, was not overly obscure in the TF community, in some parts.
Presently, a search of dA can yield some interesting results, such as this transformation process
http://fav.me/d5l24ew .
Thanks,
Alchemical Night.