Not much has changed since my last update. The fissure increased a bit, the activity increased a bit but looks all stable for now.
Míla has a webcam close to the glacier. So now we can all watch the grey ash in the air around the mountain here.
Vedur.is has a beautiful explanation of the happening (in Icelandic) on their webpage. But even when Icelandic might be difficult, it's still interesting to watch the pictures.