The latest browsers (Chrome 10.x, FireFox 4.x, Opera 11.x, and Internet Explorer 9) are out now, and they include a cool new graphics technology called the Canvas Object, or just the 'canvas'. This adds a standardized way to do 3D graphics in your browser window using just HTML (Although you have to use the new HTML 5 specification to gain access to the Canvas object functionality, but HTML 5 is built into all the latest browsers.)
Check out the Canvas support for basic effects on DOM elements in the latest version of the jQuery UI Library. [At first, it's confusing, a bunch of black graphs with different squiggles on them. It'll make sense once you click on the separate squiggles - it describes how the size of the element is going to change while the effect runs. It's just a simple effect that resizes the element, but it's a look at how Canvas is going to change the way things work in Web Apps. In a few years, I don't think we'll even recognize them any more! (Think of looking at an old HTML 1.0 page, compared to what's coming.) ]
Time to go study this fully!