Looks like Daniel Nocera has been doing some more work on (and some more promotion of) his much-publicized catalyst for water-splitting. He's just presented at the ACS meeting in Philadelphia, and has Katherine Sanderson of Nature taking note:
In today's talk he confirmed what he had thought then - that the cobalt gets oxidised all the way to its +4 oxidation state... "I guarantee in under five years you'll see this," he said.
...Other big claims he made were that in a system based on his catalyst cuold produce enoguh fuel to run a typical house for a day in just two and a half hours.
(via The Sceptical Chymist)