http://www.boston.com/bigpicture/2010/04/more_from_eyjafjallajokull.html Be sure to scroll to the bottom, some are absolutely incredible.
It also seems that after a break, the eruption has regained strength and a new ash cloud is on the way...
http://www.reuters.com/article/idUSLDE63I2FA20100420?type=marketsNews I'm no expert, but this could last for a long time. The 1821 eruption lasted almost 2 years (it was a series really)
http://en.wikipedia.org/wiki/Eyjafjallaj%C3%B6kull#1821_eruption edit: some photos of jet engine damage:
http://www.msnbc.msn.com/id/36649628/ns/us_news-environment/#storyContinued