I took part in WordCamp Russia 2013 this year, which was organized by my brother (with huge help from a handful of volunteers and the WordPress Foundation). This was the first ever WordCamp in Russia.
My talk was on testing automation in custom WordPress code, which covered some basics of unit tests using PHPUnit, system tests using CasperJS.
The talk is in Russian, but English subtitiles are available. Also slides and code. To view all other talks visit http://wordpress.tv/event/wordcamp-russia-2013/.
Konstantin wrote about the event in much detail.