Deep Zoom former known as Seadragon
One of the coolest things of MIX08 regarding the Deep Zoom is that Microsoft now integrated it into Silverlight 2. It makes it possible to navigate in images, really large images, very quick. Regarding the size of the images and the number of images that you navigate between.
It is not very easy to explain it in word so I suggest that you visit a cool site instead and explore the feature itself! :) To try this cool feature you will need to install the new Silverlight Beta 1 on your computer!
Visit: Hardrock Cafe!
(Maybe I can show you some codesnippet on how easy it is when I come back home to sweden.)
-Eric @ MIX08