The internet is the perfect medium for matching supply with demand. You can find your next freelance job or, as Craigslist has been singled out for, find just about anything else (if you know the right euphemisms). Now, with Data Marketplace, you can request or provide datasets covering anything you can think of.
Jonathan Stark's Starbucks card is seeing a lot of use this week. That's because he's sharing it with the whole Internet. Anonymous people are both using and adding money to the card and we can all follow the balance with the Jonathan's Card API or over the tweets which come rolling in once per minute.