Well I'm at the other side of the pond, sure plan to visit the:
http://uk.sonispherefestivals.com/
the local one is:
http://cz.sonispherefestival.net/ (No English version I'm afraid)
Second time I'm gonna see the Black Sabbath line up with Dio (hope he'll be in good shape)
Then I'm gonna see Queensryche in July
No definite schedule, want to have a nice summer though