Dynamic image/video as background - www.bing.com

Clicky - http://www.bing.com (Can't submit this as url as it takes it as a dupe of original bing.com submission)

Wow. That took forever to load (the first time), then locked my browser for about 5 seconds.

I can't help but think that one of the things that catapulted Google early on was the quick load times and simple entry point.

As with many things, not available in Canada (bing is, just no video background).