Germersheim will again be playing host to SPEZI, which bills itself as "Europe's largest Show for recumbents, recumbent tricycles, quadracycles, folding cycles, tandems, family cycles, velomobiles, transporters, electrical bikes, special needs bikes, adult kick scooters, child and load trailers, customized designs, accessories". I haven't been before myself but have read plenty of rave reviews.
http://www.haasies-radschlag.de/cms/index.php?show
