Today Madshrimps tries to reach a 100% overclock with a 1.6Ghz Pentium M Dothan CPU, using Dry Ice to cool the CPU this might be possible.
To make things more interesting they also push an ATI X800 to its limit running it at -52°C.
Check it out here
Intel Pentium M Overclocking - going for 100% OC on Dry Ice
