Found the thread I was looking for!

On this site, I'm partial to Ashley Zacharias. I find the stories generally well written and thought provoking.

I also enjoy some of J Lewis' stories, but wish that he'd finish off some of his earlier works (Ravaged, for example)

On Gagged Utopia's story site I also really enjoyed the recently submitted 'buried alive', the author's name having escaped me for now.