What's the best site (paid or unpaid) to do a bit of ancestry research?


Not wishing to derail the thread at all, but never been interested in finding out, personally. I know where my parents/grandparents are from, and anything beyond that has no real connection to me.
That said, I can see why people might find it interesting.
I had a new student a few weeks ago who claims to be the 77th generation descendant of Confucius. No real way to refute that, but given the limited number of Chinese surnames, I reckon quite a few people could make that claim.