Revenue from APIs and widgets - where's the money? explore Amazon and eBay shoplets, transactional settlements in widgets, Salesforce, Get Tailgate, Alvenda, Paypal. Monetizing API and the widget economy. 3rd party devs, customers selling to customers.
An intro to Freemium - Free Plus Premium. Providing online community access for free AND premium can be done. Case studies include Flickr, LinkedIn, Second Life and Wired.
Donations as revenue monetizing social networks: explore voluntary donations in shareware, freeware, open source using ChipIn, Fundable for films, Wikipedia, Pligg, & social media development. Members want to show what they value.
As we move from a service based economy to an experiential one, social media and real world events run through social networks will become big business.