intro, intermediate concurrent programming / multithreading

I know everybody in group has had to go through this transition at one
point, becoming more comfortable with concurrent programming.

I've seen the basics, am familiar a bit with facilities in mzscheme.
i'm currently using sisc for a project. i've read sicp in the past and
its discussions of mutex's, state.

just looking for one or two high quality recommendations for textbooks
or technical books on the subject. more from a perspective of good
techniques and general ideas. doesn't have to use scheme, but
preferred. need it to cover multiple approaches, can't only cover one
approach.

Checked some faq's, searched this group already, surprising didn't
find anything

my best guesses are the declarative concurrency, streams, and stateful
concurrency chapters in Concepts, Techniques, Models.... or one of the
books on concurrent ml or erlang.

appreciate it