ray_afraid said:

chyron8472 said:

The Sith are the opposite of the Jedi.
Jedi are good; Sith are evil.
Jedi use the light side of the force; Sith use the dark side.

Thanks! That's what I figured, but I'm pretty sure I read a post saying that someone doesn't want any more Siths in the new movies, but just dark side force users... made me think there must be a difference.

Read the part of my post which explains the difference between a Sith and a Dark Jedi.

In a nutshell, Dark Jedi and Sith likely used to be interchangeable when the Original Trilogy films first came out, since no one in the OT used either term to refer to Vader or Palpatine. But, various books over the years have come to establish that the Sith are are an organized sect of force-users who have a recorded history and their own code which they follow, while Dark Jedi are rogue dark side force-users who have no such code nor any allegiance to anyone.

Tobar said:

DARTH MAUL : At last we will reveal ourselves to the Jedi. At last we will have revenge.

DARTH SIDIOUS : You have been well trained, my young apprentice, they will be no match for you. It is too late for them to stop us now. Everything is going as planned. The Republic will soon be in my command.

What "revenge" is he talking about?

In the past, the Sith became too powerful, and the Jedi worked to wipe them out. Either the Sith feel oppressed by the Jedi, or else Palpatine only told this to Maul to help motivate him--it wouldn't be the first time he's lied to an apprentice.