ZDNet.co.uk posted a review on installing Intel Mac OS X on non-Mac hardware.
The [Intel Mac OS X] is bound directly to the hardware by a special security chip. However, some developers have succeeded in circumventing this coupling, allowing the operating system to be installed on any x86 system, as this test report shows.
The article describes the installation and use of Mac OS X on a Toshiba Portg M300 notebook. There are some limitations with the test installation. Of note, there only exists support for the Intel integrated graphics chipset (915G) for 3D graphics support.
ZDNet reports that power-saving functions of the Pentium M processor is already supported and the Intel OS X shows similar power consumption as Windows XP on the same notebook they tested. They also post a few benchmarks but the results come with the usual caveats for beta software.
They also post an image gallery from the installation.