Wouldn't it be neat if...
...NASA were to allow the general public to 'directly access'
the Spirit and Opportunity rovers after say 2 years on the martian surface, allowing the
public to use their PC's with a joystick or mouse to drive one of the rovers for say an hour
across the surface.
If that's impractical, NASA/JPL could sell off the operational rights of those two rovers
to some internet server, and then that company could set up a credit card run system for you to operate one of those rovers for how many hours you can afford to do so.