I don't have a lot to add, but I'd like to present the 2011 BsRized standings through June 2 (without commentary). Team-level Base Runs were generated using the following formula in conjunction with data from Baseball Prospectus and Baseball Reference:
A = H + BB + HBP - HR - 0.5*IBB
B = [1.4×TB - 0.6×H - 3×HR + 0.1×(BB + HBP - IBB) + 0.9×(SB - CS - GIDP)]×1.1
C = AB - H + CS + GIDP
D = HR
BsR = A*B/(B+C) + D
The team-level Base Runs were used in the win% estimator PythagenPat to compile the standings.
AL teams light blue, NL teams white.
These have not been adjusted for the quality of the opposition.