^^^^ What Scoober said.
Plus, remember all those moments when you'd wanna smack your head against a wall because you couldn't remember the name of some dumb movie, but you vaguely remember that a certain actor/actress was in it and when you saw it?
Not a problem any more.
The Internet Movie Database (IMDb)
That's pretty cool, IMO. Along with a million other things. I think it has lived up to the hype.
Chat with a bud on the other side of the world in real time? Also cool.