Topics in Distributed Audio

I'm much further along with distributed audio in my home than distributed video. In fact, getting ready to post an article on the topic this week. But I wanted to open this conversation as well, since again, I'm sure many of us are working on this challenge.

What works? What doesn't? Who has what? Why did you get it? How did you hook it up? I'll save posting my solution(s) 'til I've heard from some others.