Yeah, .NET and Java mostly. But I've recently started a data science Udacity course through work which includes Hadoop, MapReduce and R. I'm looking forward to it.
That is awesome. I saw it somewhere a few years ago but actually forgot about it. Thanks for sharing! I'm using R...do you code?
Data Visualisation is very interesting to me. There is some very satisfying about taking raw data and displaying it in a nice user friendly graphic.