Some people have expressed in interest in helping out online with the planning for Wikimania. I've created a page here that has a list of tasks we could use help with: http://wikimania2009.wikimedia.org/wiki/Wikimania:Online_tasks. If you'd like, you can add that page to your watchlist and then check "E-mail me when a page on my watchlist is changed" in your preferences. Then you'd get an e-mail when we update the page. :-)
Also, please make sure to list yourself on our "Online volunteers" page! http://wikimania2009.wikimedia.org/wiki/Online_volunteers
If you have any questions, feel free to reply on the list or ask a question on-wiki: http://wikimania2009.wikimedia.org/wiki/Wikimania:Community_Portal