Halo 3 Map Editor confirmed?

[url]http://www.talkxbox.com/article2200.html[/url]This added with the news of a 2nd Game Disc makes it a little more convincing. What do you guys think?Halo 3 Map Editor confirmed?
The more likely assumption is that disc 1 is the the campaign, and the second is multiplayer maps.... however that doesnt mean the map editor could not exist as part of the 2nd multiplayer disc!Halo 3 Map Editor confirmed?
I kinda assumed that singleplayer and multiplayer would be serparate...Although Halo 3 will have four player online Co Op.
[QUOTE=''fore_runner'']I kinda assumed that singleplayer and multiplayer would be serparate...Although Halo 3 will have four player online Co Op.[/QUOTE]And that is what i CANNOT wait for! 
wow....it's probably not a map editor, but that games is going to be HUGE if it's on 2 discs. one disc is probably single player, and the other disc is probably online MP.