Neil Clarke (of Clarkesworld fame) is a cyborg editing an anthology about cyborgs called 'Upgraded'.
Obvious Requirement: Cyborgs or cyborg-related issues must play a role in the story. Feel free to explore this theme as widely as you like. Have fun with it and keep in mind that not all cyborgs need to be human.
It's going to be very tough to get in, though:
Authors already scheduled to appear in this anthology: Elizabeth Bear, Helena Bell, Tobias S. Buckell, Pat Cadigan, Greg Egan, Xia Jia, Caitlín R. Kiernan, Yoon Ha Lee, Ken Liu, Chen Qiufan, Robert Reed, E. Catherine Tobler, Genevieve Valentine, Peter Watts, E. Lily Yu.
Neil is after 1,000-8,000 word stories, and is paying a ridiculously good $0.07 cents per word. The deadline is less than a month away, so get writing. Neil did say they would revise the deadline after the first week of submissions.
Check out all the guidelines here: http://neil-clarke.com/books/submission_guidelines/