> Indeed, it appears not to work in GHC 5.00.2, but I've checked that it
> does work with the forthcoming 5.02. Code is attached.
Ta much -- almost exactly what I was trying ('cept for posix sleep
rather than threadDelay, and other (apparent) niceties). I'll double
check this against 5.02 locally, in case there's some other oddity
occurring.