BOSTON (Standard&Poor's) Dec. 2, 2011--Standard&Poor's Ratings Services has revised its outlook to stable from negative on debt issued by Southern Illinois University Board of Trustees for Southern Illinois University (SIU). At the same time, Standard&Poor's has assigned its 'A+' long-term rating to the board's series 2012A housing and auxiliary facilities system (HAFS) revenue bonds. Standard&Poor's has also affirmed its 'A+' long-term rating and underlying rating (SPUR) on the board's previously issued HAFS revenue bonds, certificates of participation (COPs), and medical facilities system bonds, issued on behalf of SIU. "The return to a stable outlook reflects our view that although the state continues to delay disbursements, SIU has demonstrated the ability to successfully