Although many notebooks are now arriving with Intel's Core Duo dual core chip inside, there's no need to write off machines that still use the older Pentium M processors. The CF-W4 is testament to this and turned in some very impressive results when I benchmarked it. The MobileMark 2005 score was particularly impressive, with a battery life of five hours 22 minutes. Even more impressive was the DVD playback time of five hours 21 minutes - so you'll have no problem watching the Director's cut of your favourite Lord of the Rings movie on this little machine. The application battery life is still slightly behind the Sony VAIO TX1XP, but the DVD playback time is the best I've seen - somewhat strange for a business orientated notebook though. Also the MobileMark performance score of 175 beats both the Sony TX1XP and the Fujitsu-Siemens P7120. The SYSmark score of 157 is a little behind the other two machines, but not enough to make a difference to your working experience.
The CF-W4 measures only 268 x 210 x 44mm (WxDxH) and weighs in at a very svelte 1.29kg. That's lighter than the Fujitsu-Siemens P7120 and only a fraction heavier than the Sony TX1XP. So, if you do need to carry a notebook around with you absolutely everywhere, the CF-W4 should fit the bill very well.
Of course being that this is a Panasonic ToughBook, there are bound to be some kind of bespoke builds that no other manufacturer would ever consider - such a machine is the CF-T4. The CF-T4 was designed to be used by airline flight crew, with its integrated touch screen making it easy to perform tasks such as passenger counts. The CF-T4 has a handle on the underside that you slide your hand through, allowing you to balance the notebook on your palm while you stab at the screen.