bluewolf wrotewait how was that done , its not a flash...
is that CSS3 O.o
No, this is plain html, js and css.
By the looks of the code, it's creating X*Y divs of 8x8 pixels size positioned as a grid, using CSS sprites to populate and js events to move things around.
A more in-depth look of the JS shows that this was most possibly built using GWT.