With W7 or vista for that matter. I'm trying it with a 1G kingston datatraveller I'm not using for anything else but haven't noticed any difference in anything.. particularly how fast programs load.

I don't really need a boost... my system is very fast and I've got ample ram for what I do, but I was curious to see what Readyboost could/would do. So far not much if anything. I guess it may be more useful for on the edge systems resource-wise.