Voyager I and II

I've been following the reports from these two spacecraft since I was a child. Of course all that almost came to a stop when I was in college and later, probably because there wasn't much excitement once they left the planets behind.

Voyager Enters Solar System's Final Frontier

NASA's Voyager 1 spacecraft has entered the solar system's final frontier, a vast, turbulent expanse where the Sun's influence ends and the solar wind crashes into the thin gas between stars.

Here's the link, the site has some nice photos too...
http://www.nasa.gov/vision/universe/solarsystem/voyager_agu.html