I think it's quite easy to find genie related stories on the Internet. All you do is search for "I wish I was (whatever's your fetish)" and some hits are bound to be stories, some of which featuring genies. Anyway, here's some from my treasury:
Here you'll find "A genie's life" part 1 and 2, which are full-packed with genies granting wishes.
http://www.sapphireplace.com/stories/glover/genie.html
http://www.sapphireplace.com/stories/glover/genie2.html
Here's a fan continuation, which I have yet to read:
http://www.nocturnalaviationconsulting.com/agenies.htm
A short one:
http://www.many-realms.net/LTBSA/stories/spellrus1.htm
http://www.thevalkyrie.com/stories/gribble/fourelem.htm (super powers)
http://www.thevalkyrie.com/stories/1...enasdiary1.htm (AR, BE, IB, super powers)
Not so much a genie as a totem, but still, it grants wishes...
http://www.reocities.com/WestHollywo...shire-grin.txt (AR)
At BEarchive, in Gunslinger's story archive, there's "Wasted wishes", also kinda totem. (AR, BE, Weight loss)
There's also "Out of the bottle" by Louder, but I can't find it other than on my harddrive. (AR)
Same goes for "Puzzle Box Genie and the Magic Pendent" by Libra (AR)