“Second, there is no pre-Christian Jewish tradition suggesting that the messiah would be born of a virgin. No one used Isaiah 7:14 this way before Matthew did. Even assuming that Matthew or Luke regularly invented material to fit Jesus into earlier templates, why would they have invented something like this?”
http://www.religion-online.org/showarticle.asp?title=17 An interesting thought…then the author goes on to note that virginal births were traditional in Greek Religions, not Judaism….I think I lie in with the camp where we make miracles a bigger deal today, than the Biblical people did. Miracles happened all the time, it was Joseph still marrying Mary that was Amazing………(ie God’s work is wonderful, but human’s good work is even harder to come by)…..