Lambda the Ultimate

I've seen Fortress come upon the main page a few times, so I thought some people might be interested in a Fortress presentation by Guy Steele.

I imagine there is nothing new for people following the language, but for those, like myself, who don't, it makes for a nice overview. For instance, it explains how they are doing entry of that crazy mathematical notation.

I also found the explicit juxtaposition operator fascinating, though most likely I just haven't run across it's previous incarnations before.