Well, Twitter has the numbers, Google bought Jaiku, and some (rubel) swear by Tumblr.
People use Jaiku and Tumblr as feed aggregators and Twitter has about 40 different apps written around it. We find it a crucial app. Nubes get stuck with the terms, etiquette and different devices
would be great, thanks for great craftmanship in your videos
http://siteanalytics.compete.com/twitter.com+tumblr.com+Jaiku.com+yappd.com+hictu.com/?pid=14677