Moodle Moot Hamburg was just announced on http://moodlemoot.moodle.de. Though a reportedly smaller Moot, the event is scheduled for September 8th, 2010 at Helmut Schmidt University and is sponsored by Moodle partner, eLeDia.
For more information visit the German Moot site: http://moodlemoot.moodle.de/mod/forum/discuss.php?d=523
UPDATE 7/30: Originally this was posted incorrectly listing this Moot as an event in Hungary (this is still apparent in the URL). We apologize for the miscommunication and our geographic oversight.