I love this programme.
The Boy George one was fascinating, and it was really quite harrowing at the end.
I sent off a sample to that "MyHeritage DNA" thing last night. They can tell you stuff about different geographical areas where your family roots are likely to be from, your susceptibility to certain diseases and whether or not you are linked to anyone else who has used their service before.
If I had time I'd love to trace my family tree. My Dad has done some of his, and it is very straightforward down his Dad's side of the family. The rest of my family is a bit more complicated though, so I'll be interested to see what this DNA business throws up.