Yahoo! Publisher Network - The Next AdSense?

Yahoo announced that their Publisher Network, formerly available in the US for large websites, will be extended to small and medium-sized websites.
As stated by Yahoo representatives, this will allow the whole publishing community to take advantage of Yahoo's products and services through what they have described as an "easy-to-use self-serve platform".
Although it will initially be available only in the US, expansion is expected through use and projected increase in popularity.