I just have bought en new gadget.  The XBeam.  This device is great to strengthen the muscles of the fingers, arms and shoulders.  It's great for people who are computer operators and much more.  For computer operators it's esxpecially to end the RSI.  The device does not use weights, but centrifugal force.  It can go to 15.000 revolutions per minute and generating a counterweight of 17 kilograms !.

I have bought the Ocean Blue with Power led's so in a darker room, this gives more fun.  The harder you go with the XBeam, the harder those leds are burning.  More info @ xbeam.be