I've written a good bit of Inferno and one thing that's really neat is how closely related Limbo (the programming language) is to Go. There's good reason for this, of course-the guys who wrote Inferno went off to Google and made Go. The Tk GUI capabilities are a bit annoying to work with, but it's really not hard to whip up a GUI application in Inferno quickly--all the while getting to interact with those 9P servers which make data exchange really simple.