You can spend an hour or two looking at this cool chart. Be careful, you'll end up humming a few tunes as you follow the genealogical lines.
Larger image at: http://www.historyshots.com/ViewInfo.cfm?Type=zoom&PID=1010
Beyond Automatic Mode
Founded 1943
Old Posterous Blog
These blog postings were imported from the Posterous service before Posterous closed down. Posterous was acquired by Twitter in February 2013.
A new blog service has come on the scene, Posthaven. The developers are the same as those that started Posterous. Their promise for Posthaven? "Websites come and go. This one is made to last forever."