Last week on July 7th 2011, Google announced a new Adwords format that continues the evolution of the Sitelinks Ad Extensions feature set.
Different to the regular Single-line and Multi-line Sitelinks that appear below Adwords ads, Embedded Sitelinks
If you are advertising on Google Adwords and your Adwords Account Manager doesn't fully understand this YouTube, then you are throwing money away. Guaranteed. In all of my years in Search Engine Marketing, Online Advertising and Adwords Consulting, this is simply the best 9 minutes I've ever spent.