I happened across an article in National Geographic (did not make note of what issue), that was looking for people to do DNA tests on, for a data bank. I too wondered about the possibility of finding a DNA "trail" on my ancestors. The fee for this DNA test was about $100. However, on reading the details closely, I saw that all you would get for your sample and money, was an approximate path that your ancestors took out of Africa. So it appeared to me that they were mostly just drumming up funds for their research. I think they have already narrowed down the various paths out of Africa, so likely I would of gotten just a preprinted chart of the one my DNA came close to. They had a disclaimer that said you would not get details on grandparents, greatgrandparents, or more. From what I have read in the past, I'm not so sure that they are able to plot the more recent past on humans, or if they can, it would cost a fortune, because Europeans have such a mixture of DNA. That is why scientists get so excited about testing in remote villages, that have not bred outside their areas. This gives them a chance to add to their database. Maybe in the future this will be an option.