Despite only occasionally hacking around with array programming languages, I have always enjoyed the terse syntax. But I admittedly find weird syntax somewhat engaging.

I have wondered what was happening with statistics in the larger group of array languages. Do other HN readers know of J, Q/KDB+, Klong, or others in use by teams outside of the normal financial folks using Q/KDB+? I'd be quite interested in hearing any stories from the business world where it isn't a "lone hacker" situation, but rather even a small group of programmers were using array languages in production situations.