http://popwatch.ew.com/2010/04/20/james-cameron-talks-to-ew-about-avatar-dvd-the-sequel-and-the-future-of-3-d-and-why-clash-of-the-titans-isnt-it/

That's the new article from which the Cameron quote came from:

but it's interesting that this article came up when looking.

http://www.ew.com/ew/article/0,,286397,00.html (Jan 10, 1997

In the firmament of cinematic second-guessers, there are plenty of leading lights. Consider James Cameron, who has noodled around with expanded ''special editions'' of Aliens, The Abyss, and Terminator 2: Judgment Day for TV and video.

http://en.wikipedia.org/wiki/Aliens_(film)#Special_edition

Confirms that the noodling alluded too, was additional scenes. Of course at this time Cameron didn't have the digital playground so who knows what might happen now that he's got the tools.