readyboost
Does anyone know if it is worth getting usb drive for this? They're cheap now but was wondering if it makes a difference. Its a new feature in vista.

I think it does make a difference up to a certain size of about 2 GB. After that, I don't think there is any further improvement.

And careful because not all Usb drives works with that Vista feature. Try to get more info about it before buying 1. And yes... it does make a difference at least for reading from the drive.