Well, not fanfic exactly. But I recently took an nfic vignette that I wrote back in December 2003 and revised it to submit to a magazine. I kept the basic premise but removed the L&C and Superman aspects. Since the story wasn't a Superman one, but rather was a vignette that was relationship focused, it was easy to make it work for two original characters.
I got a contract in the mail for that story last Monday. It will appear in the February 2007 issue of Bronze Thrills magazine. I subbed to them because they publish the steamier stuff.
I also took another relationship focused nfic and re-worked it and submitted about two weeks ago. Now I wait to hear back. Keep your fingers crossed.