I gave a talk as part of the Woodland (CA) Public Library Science & Society Discussion Series (Thurs once a month). The powerpoint of the slides is here: Woodland genetic genealogy slides [ppt], a pdf of the slides is here (but lacks the animations & gifs).
The discussion was a lot of fun, with many great questions. Thanks to Sudhir Vaikkattil for inviting me, and to Woodland Public Library for hosting the series, the discussion series future schedule is here.
If you’re interested in more information you can read my blog posts on the topic, or check out one of these great books on the topic