Why should you vote? This “award” is completely determined by readers' write-in recommendations. From Tor.com:
What were the best science fiction/fantasy stories you read this past year? Or the best comics? Or the best covers?
Forget about “the best,” really, what new releases in 2011 did you enjoy the most?
For more information, and to cast your own vote(s), go here.
Full Disclosure: I am thoroughly chuffed that a couple of readers already suggested "Absinthe Fish" by M. David Blake (Bull Spec #5)... but regardless of how you felt about that one, if you read anything at all that was first published in 2011, nominating suitable candidates would be a great way to show support for the authors and artists you most enjoyed.