I guess I've been living in a bubble for a bit, but apparently there are a lot of people who still mistrust R. I got asked this week why I used R (and, specifically, the package rpart) to generate classification and regression trees instead of SAS Enterprise Miner. Never mind the fact that rpart code has been around a very long time, and probably has been subject to more scrutiny than any other decision tree code. (And never mind the fact that I really don't like classification and regression trees in general because of their limitations.)
At any rate, if someone wants to pay the big bucks for me to use SAS Enterprise Miner just on their project, they can go right ahead. Otherwise, I have got a bit of convincing to do.