I've used a couple of these in the past to make USB printers networkable. They're simple and effective.
http://www.dsl-warehouse.co.uk/product.asp?pr=PS121
Don't be put off by the price. You can grab them quite cheaply on eBay if you take your time.
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=012