Kevin: The Guardian (my former employer) is trialling hyperlocal advertising system Addiply on its local beatblogs, launched in Leeds, Edinburgh and Cardiff earlier this year. Journalism.co.uk reports: "The system, which offers low cost adverts that can be sold on a weekly or monthly basis with different rates for different sized customers."
Kevin: PARC researcher Ed Chi has piped Twitter streams through Yahoo's Build Your Own Search Service (BOSS) to extract meaning from tweets much as search engines extract meaning from search queries. This gets around the issue of extracting meaning from a limited message, such as a 140 character tweet. He is using this method to create a service called Eddi to help users find relevant information based on their Twitter stream.