Short story-- The Gene Priests

I am close to completing a new short story called "The Gene Priests". I am trying to decide whether to publish it as a stand-alone short, or whether to wait until I have a few more shorts ready, and publish them as a small collection. I am leaning toward publishing Gene Priests as a stand-alone, but also including Economicon and a preview chapter (or two) of Hemlock and the Wizard Tower with it. I think that this could be an effective marketing vehicle in addition to getting the new story in readers hands sooner than later.