BlizzCon Diablo III Panel

Joystiq brings us some coverage of a Diablo III gameplay panel from BlizzCon, where Jay Wilson and Wyatt Cheng reveal some new details about the title.
Wilson says Diablo III is "the next step" in the experience, and they're looking to upgrade it accordingly. He broke it down like this:

* Diablo - random dungeons and items, simple, action-based gameplay, and character customization (Diablo had character customization? What?)
* Diablo II - added outdoor environments, was larger, had unique classes and the skill tree.
* Diablo III - will add amazing moment to moment encounters, an expanded RPG experience, and offers new systems, of which the Rune system is only one. "Some of the other ones may remain secret for years, although we're hoping not too many years."