The 2011 Solomonoff AGI Theory Prize – named in honor of AGI pioneer Ray Solomonoff, who passed away in 2010 — was awarded to Laurent Orseau and Mark Ring, for a pair of papers titled Self-Modification and Mortality in Artificial Agents and Delusion, Survival, and Intelligent Agents.
http://www.agroparistech.fr/mmip/maths/laurent_orseau/papers/orseau-ring-AGI-2011-mortal.pdf
http://www.agroparistech.fr/mmip/maths/laurent_orseau/papers/ring-orseau-AGI-2011-delusion.pdf
My page on the topic: http://alife.co.uk/essays/the_wirehead_problem/
Laurent Orseau’s blog post about it; Mortal Universal Agents.
The blog post is a very nice summary; I think I understood all that from reading the 2 papers, but I wasn’t sure I had not missed anything important.