I'll add my thanks to the chorus. It was an amazing Wikimania.
Having participated in the organisation of quite a few Wikimanias, and since Itzik asked somewhere for "critics" so that they can do better next time, here are a few things that come to mind. I'd urge everyone to answer this thread to keep things in one place so that the team from next year can benefit from those.
* Badges: badges should be recognizable at a glance. Especially for press. But also for organizers, speakers etc.. By the time I arrived, everyone had a different lanyard, some had written badges, other printed... complicated. Make more badges than you will ever need (a safe assumption is to print about at least twice the number of badges you think you'll need). Choose colors that people can recognize at a glance. Especially for the press (I'll never stress that enough).
* Food: the food was so excellent it's not even funny (wow the hummus). But I've seen _lots_ of people looking for the vegetarian food without ever knowing which it was. So: Label food. Name of the food, principal ingredients (some are allergic to say... bell pepper, can't have milk etc.), vegetarian, kosher, whatever is of importance, make it clear.
* Moderation in the sessions: Have a _seasoned_ moderator in each room. Someone whose only job it is to cut short presentations that are too long, who can moderate discussions/questions if there is a need. Someone nasty ;).
That's about it for the main things I've seen, the rest was just great. :)
Cheers,
Delphine