http://www.newegg.com/Product/Product.asp?Item=N82E16822161632 same size, $130 and a $10 rebate
usb 1.0 is backward compatible with 1.0, it will work but at the slower speed of 1.0. smaller cache, but i think the chokepoint is going to be the usb 1.0, I don't think you'll notice the difference
I think this is the same one cheaper
http://www.newegg.com/Product/Product.asp?Item=N82E16822161629 $152 plus shiping
I built my own with this enclosure,
http://www.newegg.com/Product/Product.asp?Item=N82E16817145125 similar hardrives are much cheaper oem (30 day warranty usually)
http://www.newegg.com/Product/Product.asp?Item=N82E16822152025 Total about $92 plus shipping and it's ridiculously easy. Check local ads like best buy, hard drives are always on sale with rebates and such.