I follow Newsweek’s Tumblr: newsweek.tumblr.com
But I recently accidentally typed in this url: tumblr.com/newsweek
And that looks like a ‘Newsweek Dashboard’ including Newsweek tumblrs (they have a ’rumblr’, too?) and tumblrs by people associated with Newsweek.
Hm. I must have missed the memo on this?
UPDATE:
Very cool idea!