Here's a radar image from the Daily Mail of the Islandic volcano.
All you apocalyptic Steven King fans, go have a celebratory brewski.
There's a chance here for an interesting experiment. How long will the ash take to completely circumnavigate the world, given that the circumference of the world at 50 degrees north is not all that large, and the ash is currently making 20-80 mph.
North-South spread will depend on the size of the high and low pressure systems it gets involved with, but I bet it won't be seen south of the equator.
Al Gore has not yet weighed in on how big a tax increase would have prevented this, but I bet it's going to be a mighty chilly spring in Northern Europe, at least all the way to the Urals.