We've just posted a new video up. It shows how easy it is to use modules in Espruino.
Two modules are loaded from the SD card, one for the DS18B20 OneWire temperature sensor, and one for the Nokia 5110 LCD display. In the future we'll be looking at using the Web UI to load modules from the net - but for now you'll be able to download all available drivers onto an SD card, use it for programming, and then remove it afterwards.
(Sorry for the slightly glitchy video this time around, we'll try and fix it for subsequent videos)