Unrepresented at Wikimania

A cursory glance shows that there isn't anybody talking about Wikibooks at this years Wikimania. For that matter, very few of the sister projects are even mentioned. Cormack Lawler is doing some presenting on the topic of Wikiversity (which I'm very glad about), and Craig Spurrier is doing some talk about Wikinews, but by and large the remainder of the sister projects are unrepresented. I have to wonder if so many of the sister projects aren't well represented just because of the large divide between where Wikimania is being held, and where most of the editors are among the sister projects?