If you read new authors in the science fiction, fantasy, horror, or magical realist genres, chances are you've run into one of the authors whose work we've helped nurture. Folks we've published have shown up on Hugo, Nebula, and Stoker ballots. Several of the Campbell finalists (and I think a couple of the winners) over the last few years have been SH contributors.
Everything we publish is put up on the web, for free. We pay our writers professional rates, thanks to some small grants from arts organizations, and the support of our readers. So go read some of our stuff. And if you like it, consider chipping in a few bucks to keep us going -- we're even a registered arts non-profit, so your donation is tax-deductible.