Archiving : after its third suggestion[1], the 2005 Wikimania-site content is slowly being archived to meta: http://meta.wikimedia.org/wiki/Wikimania_2005:Main_Page
An idea for a new main page (with filler content) is being drafted; and would benefit from feedback: http://meta.wikimedia.org/wiki/User:Linuxbeak/Sandbox
And some topics have been suggested via other mailing lists : Birds-of-a-Feather sessions for trivia fans (Llywrch suggests a literary game[2]); higher-education innovators on online education (re: [3]); and the "sociological impact of Wikipedia on families and in particular on spouse[s]" (a potential submission via Anthere's husband [4] :).
Finally, the recent Nature.com review has spurred new discussions on the wiki-research list [5]; worth a look if you're not subscribed, and a good place to get feedback on research ideas.
Cheers, SJ
[1] http://meta.wikimedia.org/wiki/Talk:Wikimania_2006#Archiving_2005_content [2] http://mail.wikimedia.org/pipermail/wikien-l/2005-December/035411.html [3] http://chronicle.com/free/2005/12/2005121601t.htm [4] http://mail.wikipedia.org/pipermail/wikipedia-l/2005-December/043133.html [5] http://mail.wikipedia.org/mailman/listinfo/wiki-research-l