I've got one of the Sony Vaio's.. bought it new in 1999. Its only a 333... not fast but its small enough that you can loose it in a stack of magazines.. I've actually lost it on my desk several times. Its literally the size of a magazine. Here's one on Ebay..
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...3474086031&rd=1
They are only asking $259 for it.. that is freaking cheap! I paid twice that much just for the cd drive.. this one doesn't come with the cd drive.. btw.
Check it out.. less than 1 inch thick and weighs less than 3 lbs.