There is such a thing as a USB crossover cable. (Maplin have them). Once the driver is loaded, you simply plug each end into the USB ports on each computer. Some computer shops have never heard of them, e.g. PC World.
But these days a flash memory stick would be as cheap and probably faster. I got a 2Gb one from Aldi 2 weeks ago for under �23.
Watch out for shops selling old stock, bought in at a high price. I've seen 256Mb one recently that's still on sale at �49!
Remember, too, that if you have a digital camera and card reader, that you can use the cards in exactly the same way as a flash memory stick.