O'Reilly is promoting Brian Jepson's forthcoming book Mac OS X for Unix Geeks (former working title "...Developers" I believe) with an article called Top Ten Mac OS X Tips for Unix Geeks. The cross-fertilization continues. I have to give credit to Steve Jobs -- his NeXTStep-rehash seemed like a wacky idea a couple years ago, but it has turned out to be a brilliant way to inject energy (in the form of really smart people) into the moribund Mac userbase. The groundswell of interest from the Unix community does not seem to have peaked, either.