Marduk's cancelled at least two tours I know of because of immigration trouble, and Dark Tranquility just recently had problems... I know Lacuna Coil has toured here before, with Moonspell, so I don't know what went wrong this time.
Another after effect of Sept. 11th, really...the immigration authorities here are so much stricter now. My German neighbors are getting deported back to Germany, even though they've been living here for over TEN years, just because they filled out the paperwork wrong way back then. And then they can't move back here for another five years! Ridiculous...
Maybe the European metal bands should sneak across the Maine border like the 9/11 hijackers did!
@Cannon: Yeah, I'll be there! Unless Opeth get barred too, heh...