[plt-scheme] “Multi-threaded” Scheme…

Seemingly thanks to Erlang there is a lot of hype about programming
languages that make multi-threaded programming "easy". Not to let ACM
off the hook either for their frequent FUD blasts regarding the
imminent failure of the IT world if it can't make multi-threaded
programming easy. Whatever the case, it seems like there are a number
of interesting topics and opportunities regarding this topic.

Thinking about Scheme, and how to write multi-threaded code, is there
a simple approach, for example, that one could take by writing a
program that forked off different units of work to new Scheme machines
and waited for all of their results?