This all comes after the recent news for Night Shade Books and their authors. There's lots of pertinent info for any writer, from the terms as discussed by agent Joshua Bilmes to the contract gone over by Michael Stackpole.
A Better Deal for Night Shade Books' Authors.
The SFWA also weighs in with a brief statement.
Tobias Buckell's roundup post has been added to, considerably. If you haven't read it, I really recommend you do so. If you read nothing else, read his post, because it gets the highlights of a LOT of this discussion.
He added author Kameron Hurley's post Deal/No Deal and posts [such as the initial post, The Embarrassment of the Night Shade/Skyhorse deal] by agent Andrew Zack.
I highly recommend Kameron's and Andrew's posts. He's done several.
A Tweet from Electric Velocipede too.