What's interesting to me in the Slate article is the reference to situated meaning, the concept that something is easier to learn if it has a context provided by actions rather than simply being told its definition. It's easier for people to learn what words mean if they're using the words to mean things, rather than simply reading what they mean. That fascinates me - it actually makes me want to start playing WoW on a server where the language is one I want to learn. Maybe I need an EU account.
For the complete article, head over to Slate and give it a read.