If like me, you don't want the Dashboard icon in the dock, click and hold on it select the new 'Remove from Dock' option. You can still use the F12 key to pull up your Dashboard, so no functionality has been lost.
[robg adds: You can also just drag and drop the icon off of the dock, as in previous OS X releases. This was one of the first things I did; I'm glad Apple put an icon there for the new users, but I'm also glad they made it easily removable. Yes, this is a simple hint, but I warned you all that I'd be running some relatively basic stuff just to make sure the knowledge was out there...]

