This might be of interest to some of you, for instance Bruno, since
one of the ideals expounded here is "keep it simple".  Sorry I haven't
been participating here.

>From Wolfram Science Group:

We're excited to announce that the $25,000 Wolfram 2,3 Turing Machine
Research Prize has been won.

Alex Smith, a 20-year-old undergraduate in Birmingham, UK, has given a
40-page proof that Wolfram's 2,3 Turing machine is indeed universal.
This result ends a half-century quest to find the simplest possible
universal Turing machine. It also provides strong further evidence for
Wolfram's Principle of Computational Equivalence. The official prize
ceremony is planned for November at Bletchley Park, UK, site of Alan
Turing's wartime work.

For more information about the prize and the solution, see:

Stephen Wolfram has posted his personal reaction to the prize at:

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