Hi, Sorry I wasn't trying to be funny asking whether you meant readyboost. It's something I was really interested in click here
but this was my experience. It would be great to hear other peoples experiences of it. Maybe my flash memory wasn't quick enough but Windows happily used it. Don't be afraid to try it, it won't do any permanent harm if things don't work out.
Thats cheap for 4Gb. Have you tried it to see if it's fast enough for R/Boost. If it's not Vista won't offer the option when you plug it in. As far as security goes the R/Boost data is I believe encrypted anyway. Obviously not so anything you personally store on there unless you choose to encrypt it. Thats something I have never looked into ?