I purchased a DiskGO USB 2.0 Flash Drive (see http://www.edgetechcorp.com/usb-flash-drives/diskgo-flash-drive-readyboost.asp, also)...
...and don't recommend that you get one with a body like this:
http://www.edgetechcorp.com/Repository/ProductImages/0/definitions.jpg
I found that the plastic covering can be too easily removed. I'm now storing mine in a USB drive case.
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I've become VERY fond of non-hard drive based portable drives: I have ALWAYS been able to get them to "stop" when using "Safely Remove Hardware" in Windows (not so with the hard disk drives).
