I haven't got a huge backlog of short stories, but I've been lucky enough to have many of my best collected in the book The Engine of Recall, which is still available. Not all my good stuff made it into that collection, however--mostly because my editor, Robert J. Sawyer, wanted to focus on my strictly science fictional output. That naturally excluded "The Toy Mill" for instance--but it also left other fantasy I've written, as well as works I consider SF, but Rob did not. 

I've started transforming some of these works (previously published, but not collected) into individual bite-sized ebooks. Initially, you can find them on Amazon.com, but I'll be making epub versions as well; it's just a matter of finding the time for that, as it's a little more hands-on than the Amazon conversion.

As of now, you can find three of my stories on Amazon.com:

• "The Hero" - A Virga short story. In fact, this story is an integral part of the Virga series, and contains revelations that fill in major gaps in the overall story. It recounts certain key events that occur between Pirate Sun and The Sunless Countries, but it can also stand on its own--in fact, it makes an excellent introduction to the Virga universe for anybody who's considering taking the plunge.
• "Dawn" - My only vampire story to date. I call this my 'anti-Anne Rice' story; perhaps it's just the sort of vampire story that a writer with a pacifist Mennonite background would write. What's coolest (for me) is that this story came to me in one of the most cinematically visual dreams I've ever had. I can still picture it... so I had to write it.
• "Book, Theatre, and Wheel" - Is this SF at all? Slipstream, maybe. Set during the Inquisition, this is a meditation on memory systems, isolation and the self-invention of new mythologies...