Listly
Listly by Nick Kellet
Listly is structured data. That's how it works. Normal Lists are not. Listly's Lists are crowdsourced and crowd ranked. That's why this works, because google listens to the social signals.
The crowd keeps the list fresh.
Source: http://www.nickkellet.com/2012/03/10-examples-crowdsourced-seo-works-google-search-has-social-smarts/