Really nice adapter to connect USB Ps/2 mouse to your computer and joystick at once - Jerry+. Changing between them by clicking mouse or joy. Really fun and reasonable priced!!!
You can find it here:
http://www.ebay.co.uk/usr/electronika4you
Watch movie to see it in action:
https://www.youtube.com/watch?v=l-FWD-4jBCE