Casey Hudson and Mark Darrah are parting ways with BioWare where they had served, respectively, as General Manager and Executive Producer. There are three big posts on the BioWare Blog to hash out the news and what it means to the future of both individuals, to BioWare, and to upcoming game projects. Here's the post from Casey Hudson and here's the post from Mark Darrah. For the big picture, there's also a Message From Laura Miele, Chief Studios Officer, Electronic Arts. Here's part of that:

When I think about BioWare’s future and the next generation of talent in place, I could not be more confident or optimistic. As we look to the studio’s future and the projects currently under development, the next generation of BioWare talent is leading the studio forward and working on some incredible games that I know you will be excited to experience in the coming years.

Samantha Ryan, who came to Electronic Arts after leading Warner Brothers Games, is one of the strongest leaders in the industry. She will continue to oversee the studio. I’m also excited to announce Christian Dailey, who joined BioWare from Blizzard, will be leading our Dragon Age project currently in development. Christian is a fantastic creative leader and I look forward to you all getting to know him in the coming days. We recently announced Mass Effect: The Legendary Edition and Mike Gamble is leading a team hard at work on that franchise’s future.

The search for a new GM is underway and we are already talking to some great people. We will find the right leader who has a deep love and respect for this studio’s heritage, who embodies the values of this team and who will help carry on the incredible legacy of BioWare