What kind of black magic is this? A Pentium M in a PC that is not mobile?

OK, so Pentium-M in desktop machines has been done already but I still think its cool (and indeed they are, given that they're designed to use as little power as possible.) So, which PCs seem to suffer the most from heat problems? SFF PCs of course. Pentium M and small form factor sounds like a great pairing. PC Perspective check out an AOpen system.
The AOpen EY855-II system brings the Penium M platform to a new class of users; those looking for high performance, low noise and low power consumption. This system helps them meet all of those goals, while giving them just enough overclocking and enthusiast options to get that last little bit of performance out of their purchase.
[The review]