It looks like Intel is giving a few of the LGA775 processors the axe. Both of the Core 2 Extreme quad core chips will be retired in June 2009.
Intel has already sent out the PDN (Product Discontinuance Notice) for both the QX9770 and QX9650 Extreme Edition chips. As a very large majority of the enthusiast community most likely already has their hands on these chips, they probably aren't moving too many of them through inventory anymore compared to their new offerings for the Core i7's. If you still want one you better grab it in the coming months before they go out of stock.