Talking about a "group-book" is a lot of fun. Actually putting one together, maybe less fun.
I like to think this project will be self-promoting, if it just gets started. A few people write their chapters. I put them online, blog about them, maybe push others to blog about them, a few more people think that's a good idea and look people are actually doing it, a few more chapters come in, and so on. Soon we have 20 or so chapters, and we think an actual book. (Maybe soon after that it catches on so well we get 40 chapters, and we make an omnibus.) To me, though, the hard part is getting started.
We need some rules of management, and if I'm currently the editor assigned to your paper for say SICOMP, you might now that management is not always my strong suit. (In self-defense, I'll say it depends on the situation. Corralling referees is not my best skill. And probably not corralling authors, leading to the failure the first time around.) So here, I'm happy to take advice. Send advice! Indeed, I've had a prod or two from people who'd be interested in co-managing/editing this project, so it won't be just me-- which is great!
I'll eventually work it out with co-editor(s), but here's my rough thoughts -- totally open to change.
1. We'll send annoying e-mail to people who we might like to write chapters. (Those who were on the old list, you're not off the list.)
2. People who want to write chapters can pick (and send me) a topic, so we don't get many people writing on the same topic.
3. Authors can make their participation public, so their name and a working title goes on the Web site, or private, so they can back out.
4. There has to be some notion of deadlines -- if you say you're going to write a chapter, after time x, you have to back out (and someone else might take the topic), or show significant progress.
5. I'd hope that several people might take time over the summer to write chapters, and then maybe some others over the fall, and so on. So if you think you can spare cycles over the summer to put a draft together, let me know!