Had some USB adapters turn up today. Ordered 3 different ones from Hong Kong which added up to a grand total of £1.47 with free postage
Was done as an experiment and they took 21 days to get here. Surprising quality considering they cost less than 50p each. All work ok too, plugged a USB keyboard, mouse and flash pen into the S3 as well as wireless dongles for others too. Weird having a mouse pointer in your android browser. Thinking of getting a mhl cable now in the hope it can be used at the same time as a mouse and keyboard for easy TV screen browsing anywhere there is a HDMI port.