@OldGrumpy,
It may surprise you to learn that being born a virgin is not all that uncommon, really.
I am not ready to disbelieve the existence of a Jesus figure, simply because there is no historical evidence that he existed. It's not as if lack of such evidence is absolute proof he didn't exist, as oralloy already mentioned.
I think the shroud of Turin is pretty much bullshit, but harmless at that. If people wish to believe in its origin story, kudos to them. They don't bother me, or harm anyone by doing so, in my book.
As for the bible itself, I know it (being raised a christian and all), but I don't believe in it. Frankly, even if everything inside was proven to be 100% true, I find it quite ridiculous to use moral guidelines set in a society that existed 2000 years ago in today's world.