While the Sandy Bridge chipset flaw affects only motherboards, it seems somewhat nonsensical to be selling CPUs for the platform when there's nothing reliable yet on which to use it.
Many retailers continue to stock and sell the processor, but Newegg has taken it upon itself to pull all the second-generation Core processors from its virtual shelves. Just a quick peek at the page for the Core i7-2600K reveals that the product has been "deactivated" from inventory.
In fact, when browsing the Intel CPU category, you're treated to view that's very much 2010.
Although Newegg could be missing out on some CPU sales, it also doesn't have to contend with customers buying the processor only to return it because he or she can't get a motherboard that will run it. This could also be a good way to help clear out the previous-generation inventory.