There is a great contest going on over at The Great Crusade.
A Pre-Heresy/Heresy era short story competition judged by none other than Black Library's own
The rules are simple
-The story has to be set in the Pre-Heresy/Heresy Era
-1000 words or less.
-Only 1 story per person
-All submissions have to be in by December 31st 2359 GMT time
Last years contest was judged by Dan Abnett and all the stories can be found here