> Going from matrix operations over the whole timeseries ... to deploying to an environment that streams updates to the timeseries one at a time. I think that this is an area that haskell has the potential to excel at, given it's strong guarantees on structure.

exactly my thought. Algo guys get stuck in matrix land because that's where their tools take them. Whereas this came out in R last week: http://cran.r-project.org/web/packages/stream/index.html

python is a better toolset than R maybe, but the R problem domain seems broader in the last few months anyway.

My interest is in monitoring thousands of algorithms in real time directly within the messaging environment, and before the data hits a database. That type of concurrency is where haskell can muscle up and do the job.