off topic ping to those two:
You may find this thread on ATS about the Iceland volcanoes very interesting:
http://www.abovetopsecret.com/forum/thread586927/pg1
Icelander asserts that things are more serious than is being stated on normal media stations.
Anything is possible up there but not sure of the facts he was putting out.
Grimsvotn though is the only one that has any above normal activity besides residuals from eyjaf that still have to be watched.
Katla is pretty much below normal even.