http://msn.foxsports.com/soccer/story/3731582 This seems pretty certain to mean that the defender won't be leaving Belgium this summer. His current deal runs through to 2008, and the new extension will run to 2010. Good news for Anderlecht, but bad for all of the major clubs that were chasing Kompany.
http://www.rsca.be/article.php?aid=13802&language=en&menu=1&submenu=1 The notice on the official Anderlecht website.
It is more of a gift to Anderlecht, so they'll be sure to recuperate a lot of money for him. He won't stay longer than a year.