Earlier quoted context omitted.
Death date now reinstated. (22:09 BST, 21:09 Zulu)
It [edit: the Brazilian article] cites Steven Levy, senior writer of Wired, as the source. It does not say where the source is found, but I assume it's this tweet: http://twitter.com/#!/stevenjayl/status/128568370055491584 He may be a writer for Wired, but he doesn't seem to have a solid source either. EDIT: There seems to be someone that claims Stanford has confirmed it by phone, as you can see in the Discussion pag…
Stanford tweeted that they're still in the process of gathering information https://twitter.com/#!/stanfordeng/status/128580022675054592