Update from Jay
about.digg.com
about.digg.com
EDIT: Although reading through the techcrunch article, I'm more convinced I'm correct.
I actually met Jay last month and he mentioned a few times that he was perpetually tired (he lives in NY, but works at Digg's offices in CA), although he also seemed very excited about the future of Digg, so it's a bit surprising to see him go.