I just put the latest pre release at http://www.star-lab.com/sweeks/mlton-home.tgz Here's what's new. * The signal handling / critical section stuff. * performance.html, which contains the benchmark results. Please take a look at both. I now have nothing else on my todo list for the release. So, I'll fix up whatever's left on Wed and Thu, and we should be able to release on Friday.