Found this link on del.icio.us today:
http://www.matisse.net/OSX/darwin_commands.html
A list of unix commands that are unique to Darwin. Some are obvious like:
/Developer/ToolsGetFileInfo
Get Mac-only attributes of files & directories.
but others like:
/usr/sbin/system_profiler
Show system hardware and software configuration.
and
/bin/wait4path
Wait for given path to show up in the file system.
Could be pretty useful.
Anyway, just wanted to pass that along...
Rich