I saw a VE-powered skyscraper (tall ad on right side) on YouTube, it was interesting, although you could not zoom in/out, it seemed you can pan indefinitely. Not something you'd expect from your average banner ad.

The ad was for Microsoft's new search service unveiled last week "Live Search" with 3D maps Live Local Search

I tried to get a screenshot and hit refresh a few dozen times but the ad wouldn't come up again, it must be set for "uniques" or display once per visitor? They have quite a few things in rotation in that spot.

YouTube - Broadcast Yourself.

Interestingly, since Google owns YouTube, they are selling ad space to a competitor who is targeting their core business (search not maps).