heh i didn't know that command existed. i usually do this one, but your is a bit better.
Code:
supercow:cow ~ $ uname -a
Darwin supercow.local 7.4.0 Darwin Kernel Version 7.4.0: Wed May 12 16:58:24 PDT 2004; root:xnu/xnu-517.7.7.obj~7/RELEASE_PPC Power Macintosh powerpc