although it's some time still: also this summer the Fana'Briques will take place in the Alsace again, a two-days event focused mainly on the topic of "LEGO in movement". While last year the Tour de France passed the very location (Rosheim) on the same weekend and thus a huge LEGO race bicycle was manufactured, this time an original-sized Bugatti T35 is planned to be implemented.
Of interest may be the GBC as well (for which I hope to contribute someting again).
Unfortunately, the event's site is available in German and French only presently.
Nevertheless: jot down a big note for June's last weekend in your date book!