Mongoose has announced that they are dropping the agreement with Issaries for Runequest. However they are not abandoning the d100 system they developed with Runequest II. They intend to drop the Runequest references and release it as Wayfarers. There is a thread on their board devoted to the topic.
To me the Old School Renaissance is not about playing a particular set of rules in a particular way, the dungeon crawl. It is about going back to the roots of our hobby and seeing what we could do differently. What avenues were not explored because of the commercial and personal interests of the game designers of the time.