See website for 2012 specifics
http://www.queenbreakthru.com/
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If it is as good as last year's event, it will be well worth attending and not to be missed. If you haven't been before, and you live in the USA, then make an effort to support the guys who run the 'Breakthru' convention. It's a great weekend and one you will want to visit again and again.
Can't wait for it!