Here's another to add to the list:
Legitreviews.com - 4.9GHz w/1.4VCore. Kept getting BSOD so they dropped back to 4.7GHz @ 1.351 to get a stable OC. Temps around 76C. And that's all with Corsair H105 Extreme water cooler kit.
Legit Reviews 4790K CPU Review
Why didn't they crank the voltage and carry on @ 4.9 if they had the temperature headroom to do it? People seem to be arbitrarily scared of going above 1.4V on 22nm, but if you can handle the temperature these things will take 1.5+V all day long. Even pushed an Ivy up to 1.7V trying to get 5.2 out of it and *shock* *gasp* it didn't spontaneously explode (it also wasn't stable, but oh well I tried).