We've got two topics confirmed so far, and I'd love to add a third topic.
Steve will talk about BUGS (Bayes Using Gibbs Sampling) and the interface with R. This will include a very brief description of Bayesian statistics and the Markov Chain Monte Carlo method for fitting many Bayesian models. But the major focus will be on using R with BUGS.
Caleb will talk about Shiny, an elegant and powerful web framework for building interactive web applications using R. For more details, see http://www.rstudio.com/shiny/