Hi
After uploading my presentation slides to Slideshare I created a "Wikimania2010" event: http://www.slideshare.net/event/wikimania2010
If you also publish your slides at Slideshare, please add them to this event (join the event and select "More?" at the top right of your slide view to do so). I do not want to promote Slideshare but any simple place to put your slides online is better then not putting them online (or waiting too long) - it's just one way to do it and I found many slides from the last years but all unordered.
Cheers Jakob