This great World Business website is a “one  stop portal for new ideas from the world’s management journals and conferences.  Each concept is summarised into an easy-to-digest précis called a Review of a Review.”  The reviews cover several key management topics.   The site is co-produced by the French business school INSEAD.  INSEAD have also formed an alliance with Wharton.  You can sign up to receive email alerts or rss feed.   Thanks again to  Intute.