My Technorati authority improved tenfold (11.5 times actually) from 4 to 46, in a week.
Take a look at my authority sources and you'll realise that I'm "running on karma". My tenfold improvement is a result of my past activities in Linux forums and mailing lists.
For reasons unknown to me, my authority of 46 has slipped to 19. :-(
Oh well, that's still a far cry from the past authority of 4.