As a follow up to the run distribution articles I posted at BtB, I've posted a diary exploring the A's Runs Scored / Runs Allowed distribution in the early season, mid season, late season (as suggested by JjjSixSix and devo).
This diary is up at Beyond the Boxscore:
http://www.beyondtheboxscore.com/story/2005/12/7/214411/562
I've presented the data without commentary or analysis but I encourage you to do so if these plots get your gears cranking.
Enjoy.