Russel Winder is very active in the development of Groovy (a dynamic programming language that works symbiotically with Java on the JVM), is the author of Gant (a framework that enables scripting Ant tasks using Groovy), and is a committer on the Gradle project (Gradle is a replacement for Ant and Maven that uses Groovy instead of XML for specifying the build).
During the No Fluff, Just Stuff eXchange event held in London 2007-08-29/2007-08-31, the Groovy and Grails User Group asked Russel to do a presentation on Gant. A PDF of the slides can be found by clicking here
At the 2007-10-04 meeting of the Cambridge subgroup of ACCU, Russel Winder gave a light-hearted talk entitled Closing the Case for Groovy (and Ruby and Python) about dynamic programming languages and, in particular, closures. The emphasis was on Groovy since it is the dynamic language that is most integrated with Java.
Grails eXchange 2007 was the first conference dedicated to the dynamic programming language Groovy and the Web applications development framework Grails. Russel Winder gave a talk entitled Understanding Gant.
Thoughtworks regularly host the London Geek Night. The session on 2008-08-18 was a collection of short talks with a discussion. Russel Winder presented a short talk on Gant. The slides can be found by clicking here.
On 2009-04-14, Russel gave a talk to the London Java Community introducing Groovy. Skills Matter videod the event. The LJC page for the event has various photos and bits of feedback about the session. The session was mostly an interactive session using code snippets, what few slides there were can be found by clicking here.
On 2009-12-09, Russel gave a talk ostensibly on Gant (but also including material on the parallel processing framework GPars that he involved in developing) at the Groovy & Grails eXchange 2009. Slides can be found here. Skills Matter, who organized the event, have a page with a video here.