Biobanking activities for genetic research purposes have recently undergone nothing short of a small revolution. Many biobanks have left their traditional home of a small refrigerator in a laboratory to reach the unprecedented proportion of large, sophisticated storage centers containing DNA samples from whole populations. As we turn our attention to research on complex diseases and show great interest in human genetic variation and genetic epidemiology, we need to base our research not only on the DNA of small family cohorts, but on larger sample collections, coupled with geographic location, genealogical information, and environmental and medical data. Population genetic research projects are underway around the world. Setting up such large-scale population biobanks is a challenge for any researcher. Population genetic research projects raise legal, ethical, and social issues that need to be addressed properly in order to maintain the trust of the population, an absolute requirement for the success of such research endeavour.