It seems there is confirmation that in fact Sandy Bridge E socket 2011 processors, replacements for i7 980X and soon to be released i7-990X Extreme processors and now i7-2600K, will be out in Q4 2011.
No more details yet, up to 8 core design it is believed. Let's hope not just server parts but Extreme as well, which by the info seems to be the case. Let's wait for more on it.