The videos from Niklaus Wirth birthday symposium that
took place on the 20th are now available.

http://wirth-symposium.ethz.ch/programme.html

Probably interesting for the D crowd is Niklaus Wirth's
own talk "Reviving a computer system of 25 years ago" where
he briefly describes the OSs he was responsible for, in safe
systems programming languages, namely Modula-2 and Oberon.

He goes more into the historic overview rather than technical,
but it might be worthwhile for those interested into some computing
archaeology.

There are also other ones about language design from other known
developers.

--
Paulo