PodCastle; The Fantasy Fiction Podcast; buys fantasy, magical realism, urban fantasy, slipstream, high fantasy, etc.
Escape Pod buys science fiction.
Pseudopod buys horror.
generally 2,000-6,000 words for short fiction – pays $100
some flash fiction up to 1,000 words – pays $20
Info on how to submit to any of the 3 is HERE: http://podcastle.org/guidelines/
Ask Wendy-The Query Queen 
Some amazing and helpful information on your blog Wendy. Thanks for sharing. 🙂
Good stuff Wendy. I actually have a table of sci-fi and fantasy paying markets on my site that you (and your readers) might find useful. Check it out!
http://adamsapple2day.blogspot.com/p/science-fiction-and-fantasy-short-story.html