freebubbles, i think you may have heard some of the stories of "Nephilim" - the angels which were supposedly caught between heaven and earth when Lucifer was cast out and God shut heaven to all of lucifer's followers.
I believe the story of the nephilim to be a myth because God would have known which angels were involved w/ lucifer and would not have accidentally left some outside of heaven.
Also, as far as women angels - I do not recall any being mentioned in the Bible, in fact I only remember two being mentioned by name - Michael and Gabriel, and then two other men (no names) in conjunction with Lot in Sodom and Gomorrha.
But in actuallity I believe angels to be neither male nor female. They were not created as we were. I believe it is in the revelations that the Seraphim and Cherabim are described; and they are not human sounding at all! I believe the angels that have appeared to humans have looked human in order to be comforting and familiar (after all, it would be a scary enough visit as it were!)
In the Bible when it refers to sons and daughters of God, and sons and daughters of man; I think (and many Biblical scholars) think this refers to the saved and unsaved.
These are just some things I have come to in studying; but I don't figure I'll know for sure until I get to Heaven! <img src="/images/graemlins/wink.gif" alt="" />