When i visited the San Jose Mercury News yesterday, what did we talk about? Advertising and how newspapers were going to make it online.

Well, one trend we’re seeing big time is the move to social networks. Facebook alone has more than 100 million people on it. When you add MySpace, Microsoft’s new network, Hi5, LinkedIn, FriendFeed, Twitter, and others, these networks are seeing some sizeable traffic.

But how do they monetize? Well, Facebook has been seeing a bunch of ads lately.

Problem is banner ads just aren’t working well anymore. Most users ignore them and the smartest users use software that blocks them from being seen at all.

So, how do you overcome those problems? Make ads that people play with and want to talk to their friends about.

That’s what Kevin Barenblat’s firm, Context Optional, does. One of his Facebook apps is driving 60,000 users a day to the website that sponsored it.

In this two-part video we take a look at both the kinds of apps that Context Optional is building, but in the second part we look at the whole Facebook marketplace.

Part I, six-minute video.
Part II, 10-minute video.