I've completed the "Things to Read" side bar on the front page of my web site, which links to a selection of poems and stories you can either read online for free or buy in digital edition back issues of the magazines they appeared in. I had originally intended to re-publish some of my printed stories through Kindle and other venues, but I think I'd rather point you to the original publications where I can. The digital editions aren't very expensive, the work in them is beautifully-presented and if you buy one, you'll get the whole issue to read.
I've listed all the poetry I've published online but only a few of the stories available in PDF. Of the poetry I've listed, I like the Strange Horizons poems best, and of the stories, I like The Longest Road in the Universe best. So if you're interested in browsing just a few pieces, you might start there.
You can find the whole list at: csmaccath.com.