Steampunk Tales, a new monthly e-magazine, has a free mini issue available in either unencrypted PDF format from their website
http://www.steampunktales.com/ or as a stand alone app for the iphone/ipod touch. It's also available through mobipocket.com, but it's $0.99 or through Amazon for $1.99. (I don't know why they are charging for the Mobi/Amazon versions.)
The two regular issues are $1.99 each in unencrypted PDF or as an iTunes App or $3.99/$4.99 for the Mobi/Kindle formats and contains 10 stories each. If you like Steampunk, the magazine has an interesting mix of stories.
The pdf version has pretty basic formatting, so it's not too hard to convert into different formats.