This new technology could be huge for producing truely dynamic pages:

<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/qadw0BRKeMk"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/qadw0BRKeMk" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>