Here is the 2013-2014 version of ASPM!
There have been a couple of tweaks to the formula (no USG^2 term now, and added a linear AST term); discussion will be forthcoming. New spreadsheet (deals with Basketball Reference’s tweaks to their tables) on Google Docs.
A reminder: ASPM is not Adjusted Plus/Minus. ASPM is a box-score stat and has the limitations thereof.