Jade Raymond confirms that there is no demo planned for Assassin's Creed. Which has been met by disappointment... by me, at least.
Raymond says they're not doing a demo because Assassin's Creed is a sandbox game. She claims that sandbox games are too hard to make demos for because you can't show off much of the game.
I claim bullshit. Crackdown had a demo. It's a sandbox. And it made Charlie want to buy Crackdown. Give me a demo!