Making money online through Adsense and other ad networks

If you haven't read about it yet, yes, You Tube was bought by Google for a whopping $1.65 billion! Now enough of those eye-popping reactions  because definitely Google has something big in store on how to monetize You Tube and recoup its billion investment.

Aside from subscriptions, this one Adsense You Tube tie-in is very logical:

"Ideally, this would work by means of advertisers buying AdSense adverts tied to keywords that could be a YouTube clip's title, or even the tags within the specific content." - You Tube Adsense Integration

I think they may even go as far as inserting 5,10, or 15 sec adsense video ad clips at the beginning of every  YouTube video.

So what else do you think is in google's mind to monetize YouTube?