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

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.

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

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