Having watched those music videos in Simish, I cannot help but remember a webcomic from ten years ago:
http://plif.andkon.com/archive/wc072.gif
It’s a bit too early for the idea of completely giving up on verbal and written communication, even though both fail me occasionally. 
P.S. Funny, but the excerpt from “Levan Polkka” that is used in loituma.swf, while sounding vaguely finnish, actually is the only gibberish verse in the song, meant to imitate an instrumental solo part, which isn’t otherwise possible a-capella.