So I'm going to chime in with some talk about how this affects me (because it's all about me, right?). Here's the list of the six monthly DC Comics I am buying now:
Birds of Prey
Out of those six, four (Booster Gold. Secret Six, Xombi & Zatanna) are not being relaunched, so I don't have to worry about them I guess. I was only getting Birds of Prey for Gail Simone's writing, and I'm not familiar with the new writer, so it's off my list. And for Wonder Woman, I have heard good things about new writer Brian Azzarello, so I guess I'll give it a chance.
So, five out of six are gone! DC Comics doesn't mind, because they totally expect me to pick up some new, kewl titles! I know I'm going to get Batwoman, but... I don't know about anything else. I'm interested in Animal Man, Justice League Dark, Voodoo, Suicide Squad, Action Comics, maybe a few more, but none enought to commit to them sight unseen.
So, good luck, DC! Looks like you're going to need it....