I just noticed that CNN is reporting that there was a powerful earthquake in eastern Congo: East Africa quake buries children. Heres a quake map from the USGS site. I've made a Google Earth Overlay out of the USGS shake map.
And here's a screen shot of the overlay: [UPDATE: Anne Wright redid my overlay for me to make it work properly, and the URL is fixed. Thanks, Anne!-K]
And here's a link to the population density data set from the Central African Regional Program for the Environment: http://carpe.umd.edu/zips/congo_atwn.zip