I like that we are keeping it and keeping up on it. Just thought it would be smart to understand it. 

kenpom.com/blog/index.php/weblog/entry/a_treatise_on_plus_minus/

espn.go.com/nba/story/_/id/7551067/nba-utility-plus-minus-statistic-espn-magazine

www.sportingcharts.com/dictionary/nba/basketball-plus-minus.aspx

andrewgelman.com/2005/07/20/basketball_plus/  FOllow links for usefulness.

Interesting page here. If you scroll down to the post of jan 15 , 2010 you can look at the spreadsheet of the 2010 team and see the numbers to that point of the season . That is a good point of reference for most here as they can look at the plus/minus and have a feel for what was going on there  www.basketball-statistics.com/