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 = HRBsR = A*B/(B+C) + D
The team-level Base Runs were used in the win% estimator PythagenPat to compile the standings.
NL East
NL Central
NL West
AL East
AL Central
AL West
Overall
AL teams light blue, NL teams white.
These have not been adjusted for the quality of the opposition.