I know this might seem like the strangest question anyone would ask, but is it possible to buy enough RAM to store your OS on it? I know it's volatile, but if you kept your system powered on, and you boot from your RAM, wouldn't it be lightning fast? Sorry if this doesn't fit in this category.
Theres a linux distro called puppy linux and when you boot off a CD it will copy everything to your RAM. It's really neat because then you can save stuff back to the disc when you shut down and boot from it again next time and have your same files and stuff.