Don't forget about Cassandra, which they developed just for scalability issues that they were having, and is now used at Digg and other sites (I think reddit us

Don't forget about Cassandra, which they developed just for scalability issues that they were having, and is now used at Digg and other sites (I think reddit uses it for something as well now) http://www.facebook.com/note.php?note_id=24413138919 http://www.facebook.com/note.php?note_id=24413138919