As at the preceding useR! 2008 in Dortmund and useR! 2009 in Rennes, I presented a three-hour tutorial on high-performance computing with R. This covers scripting/automation, profiling, vectorisation, interfacing compiled code, parallel computing and large-memory approaches. The slides, as well as a condensed 2-up version, are now on my presentations page.
On Wednesday, Romain and I had a chance to talk about recent work on Rcpp, our R and C++ integration. Thursday, we followed up with a presentation on RProtoBuf -- a project integrating Google's Protocol Buffers with R which much to our delight already seems to be in use at Google itself! It was quite fun to do these two talks jointly with Romain. But my other coauthor Khanh had to be at a conference related to his actual PhD work. So on Friday it was just me to give a presentation about RQuantLib which brings QuantLib to R.
Slides from all these talks have now been added to my presentations page. I will also upload them via the conference form so that they can be part of the conference's collection of presentations which should be forthcoming.