If I remember correctly, by the end of the year all production of S939 will cease with the exception of the X2 4800+. The X2 4800+ was supposed to remain in production well into next.
Note the word "was" because that was before AMD decided to cease production of all X2 with 2x1MB cache. Therefore Dec. 31st 2006 will be the end of the road for S939 production.