Though Scifi.com took down the archives, thanks to the wonder that is the internet, the archives to SCIFICTION are still available. There are some heavy-hitters there.
Kristine Kathryn Rusch
Walter John Williams
James Patrick Kelly
That's just a glimpse of the original fiction. There are classic reprints from folks like Joan Vinge, Howard Waldrop, Samuel R. Delaney, Theodore Sturgeon, and Roger Zelazny
"Shadow Twin", by Gardner Dozois, George R. R. Martin, and Daniel Abraham (the story that would become Hunter's Run)
There's an Octavia Butler story I've never read or heard of, "The Book of Martha", and another, "Amnesty"
Seriously, it's a treasure trove of fiction.
(thanks goes to SF Signal's Facebook page for the link)