I just came across this website today called the Planet Wikimedia.
It takes in feeds from blog sites opted into its system manually and displays them on en.planet.wikimedia.org
Its important one learns how to go about adding his or her blog and contents tagged in a specific name e.g. #Wikimedia, will be taken and displayed as the planet wikimedia system reloads all blogs ever 1 hour.
learn more here; http://meta.wikimedia.org/wiki/Planet_Wikimedia
;-)