Island = Eyja = Aya (rhymes with "heya")
Cover/dwell on = fjalla = fyatla (like "fiat" + "la", but you really smoosh the f+y together and nearly swallow the "t")
Glacier = jökull = yo + kutl (like if English had a portmanteau for...um..."coddled yogurt", but changed the short O into a short U, and ran the "t" and "l" sounds together, such that it became yokutl).
I couldn't get the video to embed in this post, and it was too wide for the righthand sidebar so I've added the widget to the bottom of this page. To learn how to pronounce Eyjafjallajökull from someone who actually speaks Icelandic, instead of a TV recapper, scroll down to the bottom of the blog .