Hello! I recently (i.e. yesterday) gave a 10 minute talk at the University of Edinburgh GeoSciences Gradschool on GeologyRocks. The powerpoint I used (with some random notes) is here. Hopefully a few of my fellow PhD students might be popping along shortly...(in fact, I think there are one or two here already). The powerpoint is quite large (9Mb), so be warned. Enjoy!
GeologyRocks