This looks like an experiment worth following. Mark “Sumocat” Sumimoto found himself concerned about the heat is Tablet PC generated and of course the fan running to cool things down. According to Sumocat, the pagefile is one of the big culprits that keep disks spinning, so he’s been experimenting with turning it off and lately with directing the pagefile to an SD card.
Sort of like having the benefits of having a SSD drive without the cost to a certain degree. Check out his results and the pros and cons.