Ian Carr from http://www.iancarr.net has created a set of visualization as part of a study about the noise levels around the area of Heathrow Airport. The study is focused on uncovering the noise created by the vast network hub that is Heathrow Airport, specifically looking at the sources which create that noise, by breaking down the noises into visual format.
A lot of people feel that Ignite is great training for speakers. The strict format and auto-advancing slides can really solidify your self-confidence. Scott Berkun, the author of Making Things Happen and of an upcoming book on public speaking, did a talk on just that at the last Ignite Seattle.